Changeset 2440303

Timestamp:

12/16/2020 02:11:40 AM (5 years ago)

Author:

taxjar

Message:

Preparing for 3.2.4 release

Location:

taxjar-simplified-taxes-for-woocommerce/trunk

Files:

• CHANGELOG.md (modified) (1 diff)
• includes/class-taxjar-customer-record.php (modified) (14 diffs)
• includes/class-wc-taxjar-customer-sync.php (modified) (8 diffs)
• includes/class-wc-taxjar-integration.php (modified) (3 diffs)
• readme.txt (modified) (2 diffs)
• taxjar-woocommerce.php (modified) (2 diffs)

taxjar-simplified-taxes-for-woocommerce/trunk/CHANGELOG.md

@@ +1 @@
+# 3.2.4 (2020-12-15)
+* Fix occasional missing PTC from subscription orders
+* Fix issues that prevented exempt customers from syncing to TaxJar
+* WooCommerce 4.8.0 and WordPress 5.6 support
+
 # 3.2.3 (2020-09-28)
 * Add filter to nexus check

taxjar-simplified-taxes-for-woocommerce/trunk/includes/class-taxjar-customer-record.php

@@ -15 +15 @@
         } else {
             try {
-                $customer =  new WC_Customer( $this->get_record_id() );
+                $customer = new WC_Customer( $this->get_record_id() );
                 if ( $customer instanceof WC_Customer ) {
                     $this->object = $customer;
@@ -50 +50 @@
 
         $data = $this->get_data();
-        if ( empty( $data[ 'customer_id' ] ) ) {
+        if ( empty( $data['customer_id'] ) ) {
             $this->add_error( __( 'Customer failed validation, customer missing required field: customer_id.', 'wc-taxjar' ) );
             return false;
         }
 
-        if ( empty( $data[ 'exemption_type' ] ) ) {
+        if ( empty( $data['exemption_type'] ) ) {
             $this->add_error( __( 'Customer failed validation, customer missing required field: exemption_type.', 'wc-taxjar' ) );
             return false;
         }
 
-        if ( empty( $data[ 'name' ] ) ) {
+        if ( empty( $data['name'] ) ) {
             $this->add_error( __( 'Customer failed validation, customer missing required field: name.', 'wc-taxjar' ) );
             return false;
@@ -89 +89 @@
     public function create_in_taxjar() {
         $data = $this->get_data();
-        $url = self::API_URI . 'customers';
+        $url  = self::API_URI . 'customers';
         $body = wp_json_encode( $data );
 
-        $response = wp_remote_post( $url, array(
-            'headers' => array(
-                'Authorization' => 'Token token="' . $this->taxjar_integration->settings['api_token'] . '"',
-                'Content-Type' => 'application/json',
-            ),
-            'user-agent' => $this->taxjar_integration->ua,
-            'body' => $body,
-        ) );
+        $response = wp_remote_post(
+            $url,
+            array(
+                'headers'    => array(
+                    'Authorization' => 'Token token="' . $this->taxjar_integration->settings['api_token'] . '"',
+                    'Content-Type'  => 'application/json',
+                ),
+                'user-agent' => $this->taxjar_integration->ua,
+                'body'       => $body,
+            )
+        );
 
         $this->set_last_request( $body );
@@ -109 +112 @@
      * @return array|WP_Error - API response or WP_Error if request fails
      */
-    public function update_in_taxjar(){
+    public function update_in_taxjar() {
         $customer_id = $this->get_customer_id();
-        $data = $this->get_data();
-
-        $url = self::API_URI . 'customers/' . $customer_id;
+        $data        = $this->get_data();
+
+        $url  = self::API_URI . 'customers/' . $customer_id;
         $body = wp_json_encode( $data );
 
-        $response = wp_remote_request( $url, array(
-            'method' => 'PUT',
-            'headers' => array(
-                'Authorization' => 'Token token="' . $this->taxjar_integration->settings['api_token'] . '"',
-                'Content-Type' => 'application/json',
-            ),
-            'user-agent' => $this->taxjar_integration->ua,
-            'body' => $body,
-        ) );
+        $response = wp_remote_request(
+            $url,
+            array(
+                'method'     => 'PUT',
+                'headers'    => array(
+                    'Authorization' => 'Token token="' . $this->taxjar_integration->settings['api_token'] . '"',
+                    'Content-Type'  => 'application/json',
+                ),
+                'user-agent' => $this->taxjar_integration->ua,
+                'body'       => $body,
+            )
+        );
 
         $this->set_last_request( $body );
@@ -134 +140 @@
      * @return array|WP_Error - API response or WP_Error if request fails
      */
-    public function delete_in_taxjar(){
+    public function delete_in_taxjar() {
         $customer_id = $this->get_customer_id();
-        $url = self::API_URI . 'customers/' . $customer_id;
-        $data = array(
+        $url         = self::API_URI . 'customers/' . $customer_id;
+        $data        = array(
             'customer_id' => $customer_id,
         );
-        $body = wp_json_encode( $data );
-
-        $response = wp_remote_request( $url, array(
-            'method' => 'DELETE',
-            'headers' => array(
-                'Authorization' => 'Token token="' . $this->taxjar_integration->settings['api_token'] . '"',
-                'Content-Type' => 'application/json',
-            ),
-            'user-agent' => $this->taxjar_integration->ua,
-            'body' => $body,
-        ) );
+        $body        = wp_json_encode( $data );
+
+        $response = wp_remote_request(
+            $url,
+            array(
+                'method'     => 'DELETE',
+                'headers'    => array(
+                    'Authorization' => 'Token token="' . $this->taxjar_integration->settings['api_token'] . '"',
+                    'Content-Type'  => 'application/json',
+                ),
+                'user-agent' => $this->taxjar_integration->ua,
+                'body'       => $body,
+            )
+        );
 
         $this->set_last_request( $body );
@@ -162 +171 @@
     public function get_from_taxjar() {
         $customer_id = $this->get_customer_id();
-        $url = self::API_URI . 'customers/' . $customer_id;
-
-        $response = wp_remote_request( $url, array(
-            'method' => 'GET',
-            'headers' => array(
-                'Authorization' => 'Token token="' . $this->taxjar_integration->settings['api_token'] . '"',
-                'Content-Type' => 'application/json',
-            ),
-            'user-agent' => $this->taxjar_integration->ua,
-        ) );
+        $url         = self::API_URI . 'customers/' . $customer_id;
+
+        $response = wp_remote_request(
+            $url,
+            array(
+                'method'     => 'GET',
+                'headers'    => array(
+                    'Authorization' => 'Token token="' . $this->taxjar_integration->settings['api_token'] . '"',
+                    'Content-Type'  => 'application/json',
+                ),
+                'user-agent' => $this->taxjar_integration->ua,
+            )
+        );
 
         $this->set_last_request( $customer_id );
@@ -184 +196 @@
         $customer_data = array();
 
-        $customer_data[ 'customer_id' ] = $this->get_customer_id();
-        $customer_data[ 'exemption_type' ] = $this->get_exemption_type();
-
-        $first_name = $this->object->get_shipping_first_name();
-        $last_name = $this->object->get_shipping_last_name();
-
-        if ( empty( $first_name ) ) {
-            $first_name = $this->object->get_billing_first_name();
-            if ( empty( $first_name ) ) {
-                $first_name = $this->object->get_first_name();
-            }
-        }
-
-        if ( empty( $last_name ) ) {
-            $last_name = $this->object->get_billing_last_name();
-            if ( empty( $last_name ) ) {
-                $last_name = $this->object->get_last_name();
-            }
-        }
-
-        if ( empty( $first_name ) && empty( $last_name ) ) {
-            $name = '';
-        } else if ( empty( $first_name ) ) {
-            $name = $last_name;
-        } else if ( empty( $last_name ) ) {
-            $name = $first_name;
-        } else {
-            $name = $first_name . ' ' . $last_name;
-        }
-        $customer_data[ 'name' ] = $name;
-
-        $customer_data[ 'exempt_regions' ] = $this->get_exempt_regions();
+        $customer_data['customer_id']    = $this->get_customer_id();
+        $customer_data['name']           = $this->get_customer_name();
+        $customer_data['exemption_type'] = $this->get_exemption_type();
+        $customer_data['exempt_regions'] = $this->get_exempt_regions();
 
         $country = $this->object->get_shipping_country();
@@ -222 +206 @@
         }
         if ( ! empty( $country ) ) {
-            $customer_data[ 'country' ] = $country;
+            $customer_data['country'] = $country;
         }
 
@@ -230 +214 @@
         }
         if ( ! empty( $state ) ) {
-            $customer_data[ 'state' ] = $state;
+            $customer_data['state'] = $state;
         }
 
@@ -238 +222 @@
         }
         if ( ! empty( $postcode ) ) {
-            $customer_data[ 'zip' ] = $postcode;
+            $customer_data['zip'] = $postcode;
         }
 
@@ -246 +230 @@
         }
         if ( ! empty( $city ) ) {
-            $customer_data[ 'city' ] = $city;
+            $customer_data['city'] = $city;
         }
 
@@ -254 +238 @@
         }
         if ( ! empty( $address ) ) {
-            $customer_data[ 'street' ] = $address;
+            $customer_data['street'] = $address;
         }
 
         $customer_data = apply_filters( 'taxjar_customer_sync_data', $customer_data, $this->object );
-        $this->data = $customer_data;
+        $this->data    = $customer_data;
         return $customer_data;
     }
 
     /**
+     * Retrieves the name of the customer.
+     * Falls back to username if no shipping, billing or account names are available.
+     *
+     * @return string - Customer's name
+     */
+    public function get_customer_name() {
+        $name = $this->object->get_shipping_first_name() . ' ' . $this->object->get_shipping_last_name();
+
+        if ( ! empty( trim( $name ) ) ) {
+            return $name;
+        }
+
+        $name = $this->object->get_billing_first_name() . ' ' . $this->object->get_billing_last_name();
+
+        if ( ! empty( trim( $name ) ) ) {
+            return $name;
+        }
+
+        $name = $this->object->get_first_name() . ' ' . $this->object->get_last_name();
+
+        if ( ! empty( trim( $name ) ) ) {
+            return $name;
+        }
+
+        return $this->object->get_username();
+    }
+
+    /**
+     * Gets the user ID of the record (customer)
+     *
      * @return int|string
      */
@@ -269 +283 @@
     }
 
+    /**
+     * Gets the exemption type saved on the user
+     *
+     * @return mixed|string - exemption type
+     */
     public function get_exemption_type() {
-        $valid_types = array( 'wholesale', 'government', 'other', 'non_exempt' );
+        $valid_types    = array( 'wholesale', 'government', 'other', 'non_exempt' );
         $exemption_type = get_user_meta( $this->object->get_id(), 'tax_exemption_type', true );
-        if ( ! in_array( $exemption_type, $valid_types ) ) {
+        if ( ! in_array( $exemption_type, $valid_types, true ) ) {
             $exemption_type = 'non_exempt';
         }
@@ -278 +297 @@
     }
 
+    /**
+     * Get the exempt regions saved on the user
+     *
+     * @return array - array of exemption regions
+     */
     public function get_exempt_regions() {
-        $states = WC_Taxjar_Customer_Sync::get_all_exempt_regions();
+        $states               = WC_Taxjar_Customer_Sync::get_all_exempt_regions();
         $valid_exempt_regions = array_keys( $states );
-        $exempt_meta = get_user_meta( $this->object->get_id(), 'tax_exempt_regions', true );
-        $saved_regions = explode( ',', $exempt_meta );
-        $intersect = array_intersect( $valid_exempt_regions, $saved_regions );
-        $exempt_regions = array();
+        $exempt_meta          = get_user_meta( $this->object->get_id(), 'tax_exempt_regions', true );
+        $saved_regions        = explode( ',', $exempt_meta );
+        $intersect            = array_intersect( $valid_exempt_regions, $saved_regions );
+        $exempt_regions       = array();
 
         if ( ! empty( $intersect ) ) {
-            foreach( $intersect as $region ) {
+            foreach ( $intersect as $region ) {
                 $exempt_regions[] = array(
                     'country' => 'US',
-                    'state'   => $region
+                    'state'   => $region,
                 );
             }

taxjar-simplified-taxes-for-woocommerce/trunk/includes/class-wc-taxjar-customer-sync.php

@@ -26 +26 @@
      */
     public function init() {
-        if ( apply_filters( 'taxjar_enabled', isset( $this->taxjar_integration->settings['enabled'] ) && 'yes' == $this->taxjar_integration->settings['enabled'] ) ) {
-            add_action( 'show_user_profile', array( $this, 'add_customer_meta_fields' ) );
-            add_action( 'edit_user_profile', array( $this, 'add_customer_meta_fields' ) );
-
-            add_action( 'personal_options_update', array( $this, 'save_customer_meta_fields' ) );
-            add_action( 'edit_user_profile_update', array( $this, 'save_customer_meta_fields' ) );
-
-            add_action( 'taxjar_customer_exemption_settings_updated', array( $this, 'maybe_sync_customer_on_update' ) );
-
-            add_action( 'delete_user', array( $this, 'maybe_delete_customer' ) );
-        }
+        if ( apply_filters( 'taxjar_enabled', isset( $this->taxjar_integration->settings['enabled'] ) && 'yes' === $this->taxjar_integration->settings['enabled'] ) ) {
+            add_action( 'show_user_profile', array( $this, 'add_customer_meta_fields' ) );
+            add_action( 'edit_user_profile', array( $this, 'add_customer_meta_fields' ) );
+
+            add_action( 'personal_options_update', array( $this, 'save_customer_meta_fields' ) );
+            add_action( 'edit_user_profile_update', array( $this, 'save_customer_meta_fields' ) );
+
+            add_action( 'taxjar_customer_exemption_settings_updated', array( $this, 'maybe_sync_customer_on_update' ) );
+
+            add_action( 'delete_user', array( $this, 'maybe_delete_customer' ) );
+        }
     }
 
@@ -65 +65 @@
     public function get_customer_meta_fields() {
         $show_fields = apply_filters(
-            'taxjar_customer_meta_fields', array(
-                'exemptions'  => array(
+            'taxjar_customer_meta_fields',
+            array(
+                'exemptions' => array(
                     'title'  => __( 'TaxJar Sales Tax Exemptions', 'wc-taxjar' ),
                     'fields' => array(
-                        'tax_exemption_type'  => array(
+                        'tax_exemption_type' => array(
                             'label'       => __( 'Exemption Type', 'wc-taxjar' ),
                             'description' => __( 'All customers are presumed non-exempt unless otherwise selected.', 'wc-taxjar' ),
@@ -90 +91 @@
     }
 
+    /**
+     * Adds customer exemption fields to edit user page
+     *
+     * @param $user
+     */
     public function add_customer_meta_fields( $user ) {
         if ( ! apply_filters( 'taxjar_current_user_can_edit_customer_meta_fields', current_user_can( 'manage_woocommerce' ), $user->ID ) ) {
@@ -121 +127 @@
                                 $saved_value = esc_attr( get_user_meta( $user->ID, $key, true ) );
                                 if ( ! empty( $saved_value ) ) {
-                                    $saved_value = explode( ',', $saved_value );
-                                }
+                                    $saved_value = explode( ',', $saved_value );
+                                }
                                 foreach ( $field['options'] as $option_key => $option_value ) :
-                                    if ( ! empty( $saved_value ) && in_array( $option_key, $saved_value ) ) {
-                                        $selected = $option_key;
-                                    } else {
-                                        $selected = false;
-                                    }
+                                    if ( ! empty( $saved_value ) && in_array( $option_key, $saved_value, true ) ) {
+                                        $selected = $option_key;
+                                    } else {
+                                        $selected = false;
+                                    }
                                     ?>
                                     <option value="<?php echo esc_attr( $option_key ); ?>" <?php selected( $selected, $option_key, true ); ?>><?php echo esc_attr( $option_value ); ?></option>
@@ -143 +149 @@
                 <?php endforeach; ?>
             </table>
-        <?php
+            <?php
         endforeach;
     }
 
+    /**
+     * Saves tax exemption user meta if necessary
+     *
+     * @param $user_id - Id of user to update
+     */
     public function save_customer_meta_fields( $user_id ) {
-        if ( ! apply_filters( 'taxjar_current_user_can_edit_customer_meta_fields', current_user_can( 'manage_woocommerce' ), $user_id ) ) {
+        $has_permission = current_user_can( 'manage_woocommerce' ) || current_user_can( 'edit_users' );
+        if ( ! apply_filters( 'taxjar_current_user_can_edit_customer_meta_fields', $has_permission, $user_id ) ) {
             return;
         }
 
-        $save_fields = $this->get_customer_meta_fields();
-        $change = false;
-        foreach ( $save_fields as $fieldset ) {
-            foreach ( $fieldset['fields'] as $key => $field ) {
-                if ( isset( $field['type'] ) && 'multi-select' === $field['type'] ) {
-                    $prev_value = get_user_meta( $user_id, $key, true );
-                    if ( empty( $_POST[ $key ] ) ) {
-                        $exempt_regions = '';
-                    } else {
-                        $exempt_regions = array_map( 'wc_clean',  $_POST[ $key ] );
-                        $exempt_regions = implode( ',', $exempt_regions );
-                    }
-
-                    if ( $exempt_regions != $prev_value ) {
-                        update_user_meta( $user_id, $key, $exempt_regions );
-                        $change = true;
-                    }
-                } elseif ( isset( $_POST[ $key ] ) ) {
-                    $prev_value = get_user_meta( $user_id, $key, true );
-                    $new_value = wc_clean( $_POST[ $key ] );
-                    if ( $prev_value != $new_value ) {
-                        update_user_meta( $user_id, $key, $new_value );
-                        $change = true;
-                    }
-                }
-            }
-        }
-
-        if ( $change ) {
-            do_action( 'taxjar_customer_exemption_settings_updated', $user_id );
-        }
-    }
-
+        update_user_meta( $user_id, 'tax_exemption_type', $this->get_posted_exemption_type() );
+        update_user_meta( $user_id, 'tax_exempt_regions', $this->get_posted_exempt_regions() );
+
+        do_action( 'taxjar_customer_exemption_settings_updated', $user_id );
+    }
+
+    /**
+     * Checks if exemption type has changed when saving a user
+     *
+     * @param $user_id - Id of customer
+     *
+     * @return bool - Whether or not the exemption type has been changed
+     */
+    public function has_exemption_type_changed( $user_id ) {
+        $saved_exemption_type = self::get_saved_exemption_type( $user_id );
+        $new_exemption_type   = $this->get_posted_exemption_type();
+        if ( $new_exemption_type !== $saved_exemption_type ) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Gets the submitted tax exemption type during user save
+     *
+     * @return array|string - value to save
+     */
+    public function get_posted_exemption_type() {
+        return wc_clean( $_POST['tax_exemption_type'] );
+    }
+
+    /**
+     * Checks if exempt regions have changed for a user
+     *
+     * @param $user_id - Id of user to check
+     *
+     * @return bool - Whether or not the exempt regions have changed
+     */
+    public function have_exempt_regions_changed( $user_id ) {
+        $saved_exempt_regions = self::get_saved_exempt_regions( $user_id );
+        $new_exempt_regions   = $this->get_posted_exempt_regions();
+        if ( $new_exempt_regions !== $saved_exempt_regions ) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Gets the submitted exempt regions value during user save
+     *
+     * @return string - Concatenated string containing the exempt regions
+     */
+    public function get_posted_exempt_regions() {
+        if ( empty( $_POST['tax_exempt_regions'] ) ) {
+            return '';
+        } else {
+            return implode( ',', wc_clean( $_POST['tax_exempt_regions'] ) );
+        }
+    }
+
+    /**
+     * Gets the exemption type user meta
+     *
+     * @param $user_id - ID of user
+     *
+     * @return mixed
+     */
+    public static function get_saved_exemption_type( $user_id ) {
+        return get_user_meta( $user_id, 'tax_exemption_type', true );
+    }
+
+    /**
+     * Gets the exempt regions user metadata
+     *
+     * @param $user_id - ID of user
+     *
+     * @return mixed
+     */
+    public static function get_saved_exempt_regions( $user_id ) {
+        return get_user_meta( $user_id, 'tax_exempt_regions', true );
+    }
+
+    /**
+     * Syncs customer record to TaxJar if all validation passes
+     *
+     * @param $user_id
+     */
     public function maybe_sync_customer_on_update( $user_id ) {
         $record = TaxJar_Customer_Record::find_active_in_queue( $user_id );
@@ -199 +267 @@
 
         $result = $record->sync();
-    }
-
+    }
+
+    /**
+     * Creates array of valid option for customer exemption type dropdown
+     *
+     * @return array - customer exemption type options
+     */
     public static function get_customer_exemption_types() {
         return array(
-            'wholesale' => __( 'Wholesale / Resale', 'wc-taxjar' ),
+            'wholesale'  => __( 'Wholesale / Resale', 'wc-taxjar' ),
             'government' => __( 'Government', 'wc-taxjar' ),
-            'other' => __( 'Other', 'wc-taxjar' ),
+            'other'      => __( 'Other', 'wc-taxjar' ),
         );
     }
 
+    /**
+     * Creates array of all valid exempt regions (states)
+     *
+     * @return array - available exempt regions
+     */
     public static function get_all_exempt_regions() {
         return array(
@@ -265 +343 @@
 
     /**
-     * Deletes customer from TaxJar when synced customer is deleted in WordPress
+     * Deletes customer from TaxJar when synced customer is deleted in WordPress
+     *
      * @param $id - user id
      */
     public function maybe_delete_customer( $id ) {
         $last_sync = get_user_meta( $id, '_taxjar_last_sync', true );
-        $hash = get_user_meta( $id, '_taxjar_hash', true );
+        $hash      = get_user_meta( $id, '_taxjar_hash', true );
         if ( $last_sync || $hash ) {
-            $record = TaxJar_Customer_Record::find_active_in_queue( $id );
+            $record = TaxJar_Customer_Record::find_active_in_queue( $id );
             if ( ! $record ) {
                 $record = new TaxJar_Customer_Record( $id, true );
@@ -279 +358 @@
             $record->delete_in_taxjar();
             $record->delete();
-        }
-    }
+        }
+    }
 
 }

taxjar-simplified-taxes-for-woocommerce/trunk/includes/class-wc-taxjar-integration.php

@@ -10 +10 @@
 if ( ! class_exists( 'WC_Taxjar_Integration' ) ) :
 
-class WC_Taxjar_Integration extends WC_Settings_API {
-
-    protected static $_instance = null;
-
-    /**
-     * Main TaxJar Integration Instance.
-     * Ensures only one instance of TaxJar Integration is loaded or can be loaded.
-     *
-     * @return WC_Taxjar_Integration - Main instance.
-     */
-    public static function instance() {
-        if ( is_null( self::$_instance ) ) {
-            self::$_instance = new self();
-        }
-        return self::$_instance;
-    }
-
-    /**
-     * Init and hook in the integration.
-     */
-    public function __construct() {
-        $this->id                 = 'taxjar-integration';
-        $this->method_title       = __( 'TaxJar', 'wc-taxjar' );
-        $this->method_description = apply_filters( 'taxjar_method_description', __( 'TaxJar is the easiest to use sales tax calculation and reporting engine for WooCommerce. Connect your TaxJar account and enter the city and zip code from which your store ships. Enable TaxJar calculations to automatically collect sales tax at checkout. You may also enable sales tax reporting to begin importing transactions from this store into your TaxJar account, all in one click!<br><br><b>For the fastest help, please email <a href="mailto:[email protected]">[email protected]</a>. We\'ll get back to you within hours.</b>', 'wc-taxjar' ) );
-        $this->app_uri            = 'https://app.taxjar.com/';
-        $this->integration_uri    = $this->app_uri . 'account/apps/add/woo';
-        $this->regions_uri        = $this->app_uri . 'account#states';
-        $this->uri                = 'https://api.taxjar.com/v2/';
-        $this->ua                 = self::get_ua_header();
-        $this->debug              = filter_var( $this->get_option( 'debug' ), FILTER_VALIDATE_BOOLEAN );
-        $this->download_orders    = new WC_Taxjar_Download_Orders( $this );
-        $this->transaction_sync   = new WC_Taxjar_Transaction_Sync( $this );
-        $this->customer_sync      = new WC_Taxjar_Customer_Sync( $this );
-        $this->api_calculation    = new WC_Taxjar_API_Calculation( $this );
-
-        // Load the settings.
-        $this->init_settings();
-
-        // Cache rates for 1 hour.
-        $this->cache_time = HOUR_IN_SECONDS;
-
-        if ( $this->on_settings_page() ) {
-            add_action( 'admin_enqueue_scripts', array( $this, 'load_taxjar_admin_assets' ) );
-        }
-
-        // TaxJar Config Tab
-        add_action( 'admin_menu', array( $this, 'taxjar_admin_menu' ),  15 );
-        add_filter( 'woocommerce_settings_tabs_array', array( $this, 'add_settings_page' ), 50 );
-        add_action( 'woocommerce_sections_' . $this->id, array( $this, 'output_sections' ) );
-        add_action( 'woocommerce_settings_' . $this->id, array( $this, 'output' ) );
-        add_action( 'woocommerce_settings_save_' . $this->id, array( $this, 'save' ) );
-
-        add_filter( 'woocommerce_admin_settings_sanitize_option_woocommerce_taxjar-integration_settings', array( $this, 'sanitize_settings' ), 10, 2 );
-
-        if ( apply_filters( 'taxjar_enabled', isset( $this->settings['enabled'] ) && 'yes' == $this->settings['enabled'] ) ) {
-            // Calculate Taxes at Cart / Checkout
-            if ( class_exists( 'WC_Cart_Totals' ) ) { // Woo 3.2+
-                add_action( 'woocommerce_after_calculate_totals', array( $this, 'calculate_totals' ), 20 );
+    class WC_Taxjar_Integration extends WC_Settings_API {
+
+        protected static $_instance = null;
+
+        /**
+         * Main TaxJar Integration Instance.
+         * Ensures only one instance of TaxJar Integration is loaded or can be loaded.
+         *
+         * @return WC_Taxjar_Integration - Main instance.
+         */
+        public static function instance() {
+            if ( is_null( self::$_instance ) ) {
+                self::$_instance = new self();
+            }
+            return self::$_instance;
+        }
+
+        /**
+         * Init and hook in the integration.
+         */
+        public function __construct() {
+            $this->id                 = 'taxjar-integration';
+            $this->method_title       = __( 'TaxJar', 'wc-taxjar' );
+            $this->method_description = apply_filters( 'taxjar_method_description', __( 'TaxJar is the easiest to use sales tax calculation and reporting engine for WooCommerce. Connect your TaxJar account and enter the city and zip code from which your store ships. Enable TaxJar calculations to automatically collect sales tax at checkout. You may also enable sales tax reporting to begin importing transactions from this store into your TaxJar account, all in one click!<br><br><b>For the fastest help, please email <a href="mailto:[email protected]">[email protected]</a>. We\'ll get back to you within hours.</b>', 'wc-taxjar' ) );
+            $this->app_uri            = 'https://app.taxjar.com/';
+            $this->integration_uri    = $this->app_uri . 'account/apps/add/woo';
+            $this->regions_uri        = $this->app_uri . 'account#states';
+            $this->uri                = 'https://api.taxjar.com/v2/';
+            $this->ua                 = self::get_ua_header();
+            $this->debug              = filter_var( $this->get_option( 'debug' ), FILTER_VALIDATE_BOOLEAN );
+            $this->download_orders    = new WC_Taxjar_Download_Orders( $this );
+            $this->transaction_sync   = new WC_Taxjar_Transaction_Sync( $this );
+            $this->customer_sync      = new WC_Taxjar_Customer_Sync( $this );
+            $this->api_calculation    = new WC_Taxjar_API_Calculation( $this );
+
+            // Load the settings.
+            $this->init_settings();
+
+            // Cache rates for 1 hour.
+            $this->cache_time = HOUR_IN_SECONDS;
+
+            if ( $this->on_settings_page() ) {
+                add_action( 'admin_enqueue_scripts', array( $this, 'load_taxjar_admin_assets' ) );
+            }
+
+            // TaxJar Config Tab
+            add_action( 'admin_menu', array( $this, 'taxjar_admin_menu' ), 15 );
+            add_filter( 'woocommerce_settings_tabs_array', array( $this, 'add_settings_page' ), 50 );
+            add_action( 'woocommerce_sections_' . $this->id, array( $this, 'output_sections' ) );
+            add_action( 'woocommerce_settings_' . $this->id, array( $this, 'output' ) );
+            add_action( 'woocommerce_settings_save_' . $this->id, array( $this, 'save' ) );
+
+            add_filter( 'woocommerce_admin_settings_sanitize_option_woocommerce_taxjar-integration_settings', array( $this, 'sanitize_settings' ), 10, 2 );
+
+            if ( apply_filters( 'taxjar_enabled', isset( $this->settings['enabled'] ) && 'yes' === $this->settings['enabled'] ) ) {
+                // Calculate Taxes at Cart / Checkout
+                if ( class_exists( 'WC_Cart_Totals' ) ) { // Woo 3.2+
+                    add_action( 'woocommerce_after_calculate_totals', array( $this, 'calculate_totals' ), 20 );
+                } else {
+                    add_action( 'woocommerce_calculate_totals', array( $this, 'calculate_totals' ), 20 );
+                }
+
+                // Calculate Taxes for Backend Orders (Woo 2.6+)
+                add_action( 'woocommerce_before_save_order_items', array( $this, 'calculate_backend_totals' ), 20 );
+
+                // Calculate taxes for WooCommerce Subscriptions renewal orders
+                add_filter( 'wcs_new_order_created', array( $this, 'calculate_renewal_order_totals' ), 10, 3 );
+
+                // Settings Page
+                add_action( 'woocommerce_sections_tax', array( $this, 'output_sections_before' ), 9 );
+
+                // Filters
+                add_filter( 'woocommerce_calc_tax', array( $this, 'override_woocommerce_tax_rates' ), 10, 3 );
+                add_filter( 'woocommerce_customer_taxable_address', array( $this, 'append_base_address_to_customer_taxable_address' ), 10, 1 );
+                add_filter( 'woocommerce_matched_rates', array( $this, 'allow_street_address_for_matched_rates' ), 10, 2 );
+
+                // Scripts / Stylesheets
+                add_action( 'admin_enqueue_scripts', array( $this, 'load_taxjar_admin_new_order_assets' ) );
+
+                // If TaxJar is enabled and user disables taxes we re-enable them
+                update_option( 'woocommerce_calc_taxes', 'yes' );
+
+                // Users can set either billing or shipping address for tax rates but not shop
+                update_option( 'woocommerce_tax_based_on', 'shipping' );
+
+                // Rate calculations assume tax not included
+                update_option( 'woocommerce_prices_include_tax', 'no' );
+
+                // Use no special handling on shipping taxes, our API handles that
+                update_option( 'woocommerce_shipping_tax_class', '' );
+
+                // API handles rounding precision
+                update_option( 'woocommerce_tax_round_at_subtotal', 'no' );
+
+                // Rates are calculated in the cart assuming tax not included
+                update_option( 'woocommerce_tax_display_shop', 'excl' );
+
+                // TaxJar returns one total amount, not line item amounts
+                update_option( 'woocommerce_tax_display_cart', 'excl' );
+
+                // TaxJar returns one total amount, not line item amounts
+                update_option( 'woocommerce_tax_total_display', 'single' );
+            } // End if().
+        }
+
+        public function add_settings_page( $settings_tabs ) {
+            $settings_tabs[ $this->id ] = __( 'TaxJar', 'taxjar' );
+            return $settings_tabs;
+        }
+
+        /**
+         * Output sections.
+         */
+        public function output_sections() {
+            global $current_section;
+
+            $sections = $this->get_sections();
+
+            if ( empty( $sections ) || 1 === sizeof( $sections ) ) {
+                return;
+            }
+
+            echo '<ul class="subsubsub">';
+
+            $array_keys = array_keys( $sections );
+
+            foreach ( $sections as $id => $label ) {
+                echo '<li><a href="' . admin_url( 'admin.php?page=wc-settings&tab=' . $this->id . '&section=' . sanitize_title( $id ) ) . '" class="' . ( $current_section === $id ? 'current' : '' ) . '">' . $label . '</a> ' . ( end( $array_keys ) === $id ? '' : '|' ) . ' </li>';
+            }
+
+            echo '</ul><br class="clear" />';
+        }
+
+        /**
+         * Output the settings.
+         */
+        public function output() {
+            global $current_section;
+
+            if ( '' === $current_section ) {
+                $settings = $this->get_settings();
+                WC_Admin_Settings::output_fields( $settings );
+            } elseif ( 'transaction_backfill' === $current_section ) {
+                $this->output_transaction_backfill();
+            } elseif ( 'sync_queue' === $current_section ) {
+                $this->output_sync_queue();
+            }
+        }
+
+        /**
+         * Output the transaction backfill settings page.
+         */
+        public function output_transaction_backfill() {
+            global $hide_save_button;
+            $hide_save_button = true;
+
+            if ( isset( $this->settings['taxjar_download'] ) && 'yes' === $this->settings['taxjar_download'] ) {
+                $current_date = current_time( 'Y-m-d' );
+                ?>
+            <table class="form-table">
+                <tbody>
+                <tr valign="top">
+                    <th scope="row" class="titledesc">
+                        <label for="start_date">Backfill Start Date</label>
+                    </th>
+                    <td class="start_date_field">
+                        <input type="text" class="taxjar-datepicker" style="" name="start_date" id="start_date" value="<?php echo $current_date; ?>" placeholder="YYYY-MM-DD" pattern="[0-9]{4}-(0[1-9]|1[012])-(0[1-9]|1[0-9]|2[0-9]|3[01])">
+                    </td>
+                </tr>
+                <tr valign="top">
+                    <th scope="row" class="titledesc">
+                        <label for="end_date">Backfill End Date</label>
+                    </th>
+                    <td class="end_date_field">
+                        <input type="text" class="taxjar-datepicker" style="" name="end_date" id="end_date" value="<?php echo $current_date; ?>" placeholder="YYYY-MM-DD" pattern="[0-9]{4}-(0[1-9]|1[012])-(0[1-9]|1[0-9]|2[0-9]|3[01])">
+                    </td>
+                </tr>
+                <tr valign="top" class="">
+                    <th scope="row" class="titledesc">Force Sync</th>
+                    <td class="forminp forminp-checkbox">
+                        <fieldset>
+                            <legend class="screen-reader-text"><span>Force Sync</span></legend>
+                            <label for="force_sync">
+                                <input name="force_sync" id="force_sync" type="checkbox" class="" value="1"> If enabled, all orders and refunds will be added to the queue to sync to TaxJar, regardless of if they have been updated since they were lasted synced.
+                            </label>
+                        </fieldset>
+                    </td>
+                </tr>
+                </tbody>
+            </table>
+            <p>
+                <button class='button js-wc-taxjar-transaction-backfill'>Run Backfill</button>
+            </p>
+                <?php
             } else {
-                add_action( 'woocommerce_calculate_totals', array( $this, 'calculate_totals' ), 20 );
-            }
-
-            // Calculate Taxes for Backend Orders (Woo 2.6+)
-            add_action( 'woocommerce_before_save_order_items', array( $this, 'calculate_backend_totals' ), 20 );
-
-            // Calculate taxes for WooCommerce Subscriptions renewal orders
-            add_filter( 'wcs_new_order_created', array( $this, 'calculate_renewal_order_totals' ), 10, 3 );
-
-            // Settings Page
-            add_action( 'woocommerce_sections_tax',  array( $this, 'output_sections_before' ),  9 );
-
-            // Filters
-            add_filter( 'woocommerce_calc_tax', array( $this, 'override_woocommerce_tax_rates' ), 10, 3 );
-            add_filter( 'woocommerce_customer_taxable_address', array( $this, 'append_base_address_to_customer_taxable_address' ), 10, 1 );
-            add_filter( 'woocommerce_matched_rates', array( $this, 'allow_street_address_for_matched_rates' ), 10, 2 );
-
-            // Scripts / Stylesheets
-            add_action( 'admin_enqueue_scripts', array( $this, 'load_taxjar_admin_new_order_assets' ) );
-
-            // If TaxJar is enabled and user disables taxes we re-enable them
-            update_option( 'woocommerce_calc_taxes', 'yes' );
-
-            // Users can set either billing or shipping address for tax rates but not shop
-            update_option( 'woocommerce_tax_based_on', 'shipping' );
-
-            // Rate calculations assume tax not included
-            update_option( 'woocommerce_prices_include_tax', 'no' );
-
-            // Use no special handling on shipping taxes, our API handles that
-            update_option( 'woocommerce_shipping_tax_class', '' );
-
-            // API handles rounding precision
-            update_option( 'woocommerce_tax_round_at_subtotal', 'no' );
-
-            // Rates are calculated in the cart assuming tax not included
-            update_option( 'woocommerce_tax_display_shop', 'excl' );
-
-            // TaxJar returns one total amount, not line item amounts
-            update_option( 'woocommerce_tax_display_cart', 'excl' );
-
-            // TaxJar returns one total amount, not line item amounts
-            update_option( 'woocommerce_tax_total_display', 'single' );
-        } // End if().
-    }
-
-    public function add_settings_page( $settings_tabs ) {
-        $settings_tabs[ $this->id ] = __( 'TaxJar', 'taxjar' );
-        return $settings_tabs;
-    }
-
-    /**
-     * Output sections.
-     */
-    public function output_sections() {
-        global $current_section;
-
-        $sections = $this->get_sections();
-
-        if ( empty( $sections ) || 1 === sizeof( $sections ) ) {
-            return;
-        }
-
-        echo '<ul class="subsubsub">';
-
-        $array_keys = array_keys( $sections );
-
-        foreach ( $sections as $id => $label ) {
-            echo '<li><a href="' . admin_url( 'admin.php?page=wc-settings&tab=' . $this->id . '&section=' . sanitize_title( $id ) ) . '" class="' . ( $current_section == $id ? 'current' : '' ) . '">' . $label . '</a> ' . ( end( $array_keys ) == $id ? '' : '|' ) . ' </li>';
-        }
-
-        echo '</ul><br class="clear" />';
-    }
-
-    /**
-     * Output the settings.
-     */
-    public function output() {
-        global $current_section;
-
-        if ( $current_section == '' ) {
-            $settings = $this->get_settings();
-            WC_Admin_Settings::output_fields( $settings );
-        } else if ( $current_section == 'transaction_backfill' ) {
-            $this->output_transaction_backfill();
-        } else if ( $current_section == 'sync_queue' ) {
-            $this->output_sync_queue();
-        }
-    }
-
-    /**
-     * Output the transaction backfill settings page.
-     */
-    public function output_transaction_backfill() {
-        global $hide_save_button;
-        $hide_save_button = true;
-
-        if ( isset( $this->settings['taxjar_download'] ) && 'yes' == $this->settings['taxjar_download'] ) {
-            $current_date = current_time( 'Y-m-d' );
-            ?>
-            <table class="form-table">
-                <tbody>
-                <tr valign="top">
-                    <th scope="row" class="titledesc">
-                        <label for="start_date">Backfill Start Date</label>
-                    </th>
-                    <td class="start_date_field">
-                        <input type="text" class="taxjar-datepicker" style="" name="start_date" id="start_date"
-                               value="<?php echo $current_date; ?>" placeholder="YYYY-MM-DD"
-                               pattern="[0-9]{4}-(0[1-9]|1[012])-(0[1-9]|1[0-9]|2[0-9]|3[01])">
-                    </td>
-                </tr>
-                <tr valign="top">
-                    <th scope="row" class="titledesc">
-                        <label for="end_date">Backfill End Date</label>
-                    </th>
-                    <td class="end_date_field">
-                        <input type="text" class="taxjar-datepicker" style="" name="end_date" id="end_date"
-                               value="<?php echo $current_date; ?>" placeholder="YYYY-MM-DD"
-                               pattern="[0-9]{4}-(0[1-9]|1[012])-(0[1-9]|1[0-9]|2[0-9]|3[01])">
-                    </td>
-                </tr>
-                <tr valign="top" class="">
-                    <th scope="row" class="titledesc">Force Sync</th>
-                    <td class="forminp forminp-checkbox">
-                        <fieldset>
-                            <legend class="screen-reader-text"><span>Force Sync</span></legend>
-                            <label for="force_sync">
-                                <input name="force_sync" id="force_sync" type="checkbox" class="" value="1"> If enabled,
-                                all orders and refunds will be added to the queue to sync to TaxJar, regardless of if
-                                they have been updated since they were lasted synced.
-                            </label>
-                        </fieldset>
-                    </td>
-                </tr>
-                </tbody>
-            </table>
-            <p>
-                <button class='button js-wc-taxjar-transaction-backfill'>Run Backfill</button>
-            </p>
-            <?php
-        } else {
-            ?>
-                <p>Sales Tax Reporting must be enabled in order to use transaction back fill.</p>
-            <?php
-        }
-    }
-
-    /**
-     * Output the sync queue settings page.
-     */
-    public function output_sync_queue() {
-        global $hide_save_button;
-        $hide_save_button = true;
-
-        if ( isset( $this->settings['taxjar_download'] ) && 'yes' == $this->settings['taxjar_download'] ) {
-            $report = new WC_Taxjar_Queue_List();
-            $report->output_report();
-        } else {
-            ?>
-                <p>Enable Sales Tax Reporting in order to view the transaction queue.</p>
-            <?php
-        }
-    }
-
-    /**
-     * Get settings array.
-     *
-     * @return array
-     */
-    public function get_settings( $current_section = '' ) {
-        $settings = array();
-
-        if ( '' === $current_section ) {
-            $store_settings = $this->get_store_settings();
-            $tj_connection  = new WC_TaxJar_Connection( $this );
-
-            if ( empty( $store_settings['state'] ) ) {
-                $store_settings['state'] = 'N/A';
-            }
-
-            $api_token_valid = apply_filters( 'taxjar_api_token_valid', $this->post_or_setting( 'api_token' ) && $tj_connection->api_token_valid );
-
-            $settings = array(
-                array(
-                    'title' => __( 'TaxJar', 'wc-taxjar' ),
-                    'type'  => 'title',
-                    'desc'  => __( "TaxJar is the easiest to use sales tax calculation and reporting engine for WooCommerce. Connect your TaxJar account and enter the city and zip code from which your store ships. Enable TaxJar calculations to automatically collect sales tax at checkout. You may also enable sales tax reporting to begin importing transactions from this store into your TaxJar account, all in one click!", 'wc-taxjar' ),
-                ),
-                array(
-                    'type' => 'sectionend',
-                ),
-                array(
-                    'type' => 'title',
-                    'desc' => '<strong>' . __( "For the fastest help, please email", 'wc-taxjar' ) . ' <a href="mailto:[email protected]">[email protected]</a>. ' . __( "We'll get back to you within hours.", 'wc-taxjar' ),
-                ),
-                array(
-                    'type' => 'sectionend',
-                ),
-                array(
-                    'title' => __( 'Step 1: Activate your TaxJar WooCommerce Plugin', 'wc-taxjar' ),
-                    'type'  => 'title',
-                    'desc'  => '',
-                ),
-
-            );
-
-            if ( $api_token_valid ) {
-                $connected_email = $this->post_or_setting( 'connected_email' );
-
-                if ( $connected_email ) {
-                    array_push( $settings, array(
+                ?>
+                <p>Sales Tax Reporting must be enabled in order to use transaction back fill.</p>
+                <?php
+            }
+        }
+
+        /**
+         * Output the sync queue settings page.
+         */
+        public function output_sync_queue() {
+            global $hide_save_button;
+            $hide_save_button = true;
+
+            if ( isset( $this->settings['taxjar_download'] ) && 'yes' === $this->settings['taxjar_download'] ) {
+                $report = new WC_Taxjar_Queue_List();
+                $report->output_report();
+            } else {
+                ?>
+                <p>Enable Sales Tax Reporting in order to view the transaction queue.</p>
+                <?php
+            }
+        }
+
+        /**
+         * Get settings array.
+         *
+         * @return array
+         */
+        public function get_settings( $current_section = '' ) {
+            $settings = array();
+
+            if ( '' === $current_section ) {
+                $store_settings = $this->get_store_settings();
+                $tj_connection  = new WC_TaxJar_Connection( $this );
+
+                if ( empty( $store_settings['state'] ) ) {
+                    $store_settings['state'] = 'N/A';
+                }
+
+                $api_token_valid = apply_filters( 'taxjar_api_token_valid', $this->post_or_setting( 'api_token' ) && $tj_connection->api_token_valid );
+
+                $settings = array(
+                    array(
+                        'title' => __( 'TaxJar', 'wc-taxjar' ),
+                        'type'  => 'title',
+                        'desc'  => __( 'TaxJar is the easiest to use sales tax calculation and reporting engine for WooCommerce. Connect your TaxJar account and enter the city and zip code from which your store ships. Enable TaxJar calculations to automatically collect sales tax at checkout. You may also enable sales tax reporting to begin importing transactions from this store into your TaxJar account, all in one click!', 'wc-taxjar' ),
+                    ),
+                    array(
+                        'type' => 'sectionend',
+                    ),
+                    array(
+                        'type' => 'title',
+                        'desc' => '<strong>' . __( 'For the fastest help, please email', 'wc-taxjar' ) . ' <a href="mailto:[email protected]">[email protected]</a>. ' . __( "We'll get back to you within hours.", 'wc-taxjar' ),
+                    ),
+                    array(
+                        'type' => 'sectionend',
+                    ),
+                    array(
+                        'title' => __( 'Step 1: Activate your TaxJar WooCommerce Plugin', 'wc-taxjar' ),
+                        'type'  => 'title',
+                        'desc'  => '',
+                    ),
+
+                );
+
+                if ( $api_token_valid ) {
+                    $connected_email = $this->post_or_setting( 'connected_email' );
+
+                    if ( $connected_email ) {
+                        array_push(
+                            $settings,
+                            array(
+                                'title' => '',
+                                'type'  => 'title',
+                                'desc'  => '<div class="taxjar-connected"><span class="dashicons dashicons-yes-alt"></span><p>' . $connected_email . '</p></div>',
+                                'id'    => 'connected-to-taxjar',
+                            )
+                        );
+                    } else {
+                        array_push(
+                            $settings,
+                            array(
+                                'title' => '',
+                                'type'  => 'title',
+                                'desc'  => '<div class="taxjar-connected"><span class="dashicons dashicons-yes-alt"></span><p>Connected To TaxJar</p></div>',
+                                'id'    => 'connected-to-taxjar',
+                            )
+                        );
+                    }
+
+                    array_push(
+                        $settings,
+                        array(
+                            'title' => '',
+                            'type'  => 'title',
+                            'desc'  => '<button id="disconnect-from-taxjar" name="disconnect-from-taxjar" class="button-primary" type="submit" value="Disconnect">' . __( 'Disconnect From TaxJar', 'wc-taxjar' ) . '</button><p><a href="#" id="connect-manual-edit">' . __( 'Edit API Token', 'wc-taxjar' ) . '</a></p>',
+                        )
+                    );
+                } else {
+                    array_push(
+                        $settings,
+                        array(
+                            'title' => '',
+                            'type'  => 'title',
+                            'desc'  => '<button id="connect-to-taxjar" name="connect-to-taxjar" class="button-primary" type="submit" value="Connect">' . __( 'Connect To TaxJar', 'wc-taxjar' ) . '</button><p>' . __( 'Already have an API Token?', 'wc-taxjar' ) . ' <a href="#" id="connect-manual-edit">' . __( 'Edit API Token.', 'wc-taxjar' ) . '</a></p>',
+                        )
+                    );
+                }
+
+                array_push(
+                    $settings,
+                    array(
+                        'title'   => 'TaxJar API Token',
+                        'type'    => 'text',
+                        'desc'    => '<p class="hidden tj-api-token-title"><a href="' . $this->app_uri . 'account#api-access" target="_blank">' . __( 'Get API token', 'wc-taxjar' ) . '</a></p>',
+                        'default' => '',
+                        'class'   => 'hidden',
+                        'id'      => 'woocommerce_taxjar-integration_settings[api_token]',
+                    )
+                );
+                array_push(
+                    $settings,
+                    array(
+                        'type' => 'sectionend',
+                    )
+                );
+                array_push(
+                    $settings,
+                    array(
                         'title' => '',
-                        'type'  => 'title',
-                        'desc'  => '<div class="taxjar-connected"><span class="dashicons dashicons-yes-alt"></span><p>' . $connected_email . '</p></div>',
-                        'id'    => 'connected-to-taxjar'
-                    ) );
-                } else {
-                    array_push( $settings, array(
-                        'title' => '',
-                        'type'  => 'title',
-                        'desc'  => '<div class="taxjar-connected"><span class="dashicons dashicons-yes-alt"></span><p>Connected To TaxJar</p></div>',
-                        'id'    => 'connected-to-taxjar'
-                    ) );
-                }
-
-                array_push( $settings, array(
-                    'title' => '',
-                    'type'  => 'title',
-                    'desc'  => __( '<button id="disconnect-from-taxjar" name="disconnect-from-taxjar" class="button-primary" type="submit" value="Disconnect">Disconnect From TaxJar</button><p><a href="#" id="connect-manual-edit">Edit API Token</a></p>', 'wc-taxjar' ),
-                ) );
-            } else {
-                array_push( $settings, array(
-                    'title' => '',
-                    'type'  => 'title',
-                    'desc'  => __( '<button id="connect-to-taxjar" name="connect-to-taxjar" class="button-primary" type="submit" value="Connect">Connect To TaxJar</button><p>Already have an API Token? <a href="#" id="connect-manual-edit">Edit API Token.</a></p>', 'wc-taxjar' ),
-                ) );
-            }
-
-            array_push( $settings, array(
-                'title'   => 'TaxJar API Token',
-                'type'  => 'text',
-                'desc'  => __( '<p class="hidden tj-api-token-title"><a href="' . $this->app_uri . 'account#api-access" target="_blank">Get API token</a></p>', 'wc-taxjar' ),
-                'default' => '',
-                'class'   => 'hidden',
-                'id'      => 'woocommerce_taxjar-integration_settings[api_token]'
-            ) );
-            array_push( $settings, array(
-                'type' => 'sectionend',
-            ) );
-            array_push( $settings, array(
-                'title'    => '',
-                'type'      => 'email',
-                'desc'      => '',
-                'class'    => 'hidden',
-                'id'          => 'woocommerce_taxjar-integration_settings[connected_email]'
-            ) );
-            array_push( $settings, array(
-                'type' => 'sectionend',
-            ) );
-
-            if ( ! $tj_connection->can_connect || ! $tj_connection->api_token_valid ) {
-                array_push( $settings, $tj_connection->get_form_settings_field() );
-                array_push( $settings, array(
-                    'type' => 'sectionend',
-                ) );
-            }
-
-            if ( $api_token_valid ) {
-                array_push( $settings, array(
-                    'title' => __( 'Step 2: Configure your sales tax settings', 'wc-taxjar' ),
-                    'type'  => 'title',
-                    'desc'  => ''
-                ) );
-                array_push( $settings, array(
-                    'title'   => __( 'Sales Tax Calculation', 'wc-taxjar' ),
-                    'type'    => 'checkbox',
-                    'default' => 'no',
-                    'desc'    => __( 'If enabled, TaxJar will calculate sales tax for your store.', 'wc-taxjar' ),
-                    'id'      => 'woocommerce_taxjar-integration_settings[enabled]'
-                ) );
-                array_push( $settings, array(
-                    'title'   => __( 'Tax Calculation on API Orders', 'wc-taxjar' ),
-                    'type'    => 'checkbox',
-                    'default' => 'no',
-                    'desc'    => __( 'If enabled, TaxJar will calculate sales tax for orders created through the WooCommerce REST API.', 'wc-taxjar' ),
-                    'id'      => 'woocommerce_taxjar-integration_settings[api_calcs_enabled]'
-                ) );
-                array_push( $settings, array(
-                    'type' => 'sectionend',
-                ) );
-
-                if ( $this->post_or_setting( 'enabled' ) ) {
-                    $tj_nexus   = new WC_Taxjar_Nexus( $this );
-                    $settings[] = $tj_nexus->get_form_settings_field();
+                        'type'  => 'email',
+                        'desc'  => '',
+                        'class' => 'hidden',
+                        'id'    => 'woocommerce_taxjar-integration_settings[connected_email]',
+                    )
+                );
+                array_push(
+                    $settings,
+                    array(
+                        'type' => 'sectionend',
+                    )
+                );
+
+                if ( ! $tj_connection->can_connect || ! $tj_connection->api_token_valid ) {
+                    array_push( $settings, $tj_connection->get_form_settings_field() );
+                    array_push(
+                        $settings,
+                        array(
+                            'type' => 'sectionend',
+                        )
+                    );
+                }
+
+                if ( $api_token_valid ) {
+                    array_push(
+                        $settings,
+                        array(
+                            'title' => __( 'Step 2: Configure your sales tax settings', 'wc-taxjar' ),
+                            'type'  => 'title',
+                            'desc'  => '',
+                        )
+                    );
+                    array_push(
+                        $settings,
+                        array(
+                            'title'   => __( 'Sales Tax Calculation', 'wc-taxjar' ),
+                            'type'    => 'checkbox',
+                            'default' => 'no',
+                            'desc'    => __( 'If enabled, TaxJar will calculate sales tax for your store.', 'wc-taxjar' ),
+                            'id'      => 'woocommerce_taxjar-integration_settings[enabled]',
+                        )
+                    );
+                    array_push(
+                        $settings,
+                        array(
+                            'title'   => __( 'Tax Calculation on API Orders', 'wc-taxjar' ),
+                            'type'    => 'checkbox',
+                            'default' => 'no',
+                            'desc'    => __( 'If enabled, TaxJar will calculate sales tax for orders created through the WooCommerce REST API.', 'wc-taxjar' ),
+                            'id'      => 'woocommerce_taxjar-integration_settings[api_calcs_enabled]',
+                        )
+                    );
+                    array_push(
+                        $settings,
+                        array(
+                            'type' => 'sectionend',
+                        )
+                    );
+
+                    if ( $this->post_or_setting( 'enabled' ) ) {
+                        $tj_nexus   = new WC_Taxjar_Nexus( $this );
+                        $settings[] = $tj_nexus->get_form_settings_field();
+                        $settings[] = array(
+                            'type' => 'sectionend',
+                        );
+                    }
+
+                    if ( get_option( 'woocommerce_store_address' ) || get_option( 'woocommerce_store_city' ) || get_option( 'woocommerce_store_postcode' ) ) {
+                        $settings[] = array(
+                            'title' => __( 'Ship From Address', 'wc-taxjar' ),
+                            'type'  => 'title',
+                            'desc'  => __( 'We have automatically detected your ship from address:', 'wc-taxjar' ) . '<br><br>' . $store_settings['street'] . '<br>' . $store_settings['city'] . ', ' . $store_settings['state'] . ' ' . $store_settings['postcode'] . '<br>' . WC()->countries->countries[ $store_settings['country'] ] . '<br><br>' . __( 'You can change this setting at:', 'wc-taxjar' ) . '<br><a href="' . get_admin_url( null, 'admin.php?page=wc-settings' ) . '">WooCommerce -> Settings -> General -> Store Address</a>',
+                        );
+                        $settings[] = array(
+                            'type' => 'sectionend',
+                        );
+                    } else {
+                        $settings[] = array(
+                            'type' => 'title',
+                        );
+                        $settings[] = array(
+                            'title'    => __( 'Ship From Address', 'wc-taxjar' ),
+                            'type'     => 'text',
+                            'desc'     => __( 'Enter the street address where your store ships from.', 'wc-taxjar' ),
+                            'desc_tip' => true,
+                            'default'  => '',
+                            'id'       => 'woocommerce_taxjar-integration_settings[store_street]',
+                        );
+                        $settings[] = array(
+                            'title'       => __( 'Ship From City', 'wc-taxjar' ),
+                            'type'        => 'text',
+                            'description' => __( 'Enter the city where your store ships from.', 'wc-taxjar' ),
+                            'desc_tip'    => true,
+                            'default'     => '',
+                            'id'          => 'woocommerce_taxjar-integration_settings[store_city]',
+                        );
+                        $settings[] = array(
+                            'title'       => __( 'Ship From State', 'wc-taxjar' ),
+                            'type'        => 'title',
+                            'description' => __( 'We have automatically detected your ship from state as being ', 'wc-taxjar' ) . $store_settings['state'] . '.<br>' . __( 'You can change this setting at', 'wc-taxjar' ) . ' <a href="' . get_admin_url( null, 'admin.php?page=wc-settings' ) . '">WooCommerce -> Settings -> General -> Base Location</a>',
+                            'class'       => 'input-text disabled regular-input',
+                            'id'          => 'woocommerce_taxjar-integration_settings[store_state]',
+                        );
+                        $settings[] = array(
+                            'title'       => __( 'Ship From Postcode / ZIP', 'wc-taxjar' ),
+                            'type'        => 'text',
+                            'description' => __( 'Enter the zip code from which your store ships products.', 'wc-taxjar' ),
+                            'desc_tip'    => true,
+                            'default'     => '',
+                            'id'          => 'woocommerce_taxjar-integration_settings[store_postcode]',
+                        );
+                        $settings[] = array(
+                            'title'       => __( 'Ship From Country', 'wc-taxjar' ),
+                            'type'        => 'hidden',
+                            'description' => __( 'We have automatically detected your ship from country as being ', 'wc-taxjar' ) . $store_settings['country'] . '.<br>' . __( 'You can change this setting at', 'wc-taxjar' ) . ' <a href="' . get_admin_url( null, 'admin.php?page=wc-settings' ) . '">WooCommerce -> Settings -> General -> Base Location</a>',
+                            'class'       => 'input-text disabled regular-input',
+                            'id'          => 'woocommerce_taxjar-integration_settings[store_country]',
+                        );
+                        $settings[] = array(
+                            'type' => 'sectionend',
+                        );
+                    }
+
                     $settings[] = array(
-                        'type' => 'sectionend',
+                        'type' => 'title',
                     );
-                }
-
-                if ( get_option( 'woocommerce_store_address' ) || get_option( 'woocommerce_store_city' ) || get_option( 'woocommerce_store_postcode' ) ) {
+                    $settings[] = $this->download_orders->get_form_settings_field();
                     $settings[] = array(
-                        'title' => __( 'Ship From Address', 'wc-taxjar' ),
-                        'type'  => 'title',
-                        'desc'  => __( 'We have automatically detected your ship from address:<br><br>' . $store_settings['street'] . '<br>' . $store_settings['city'] . ', ' . $store_settings['state'] . ' ' . $store_settings['postcode'] . '<br>' . WC()->countries->countries[ $store_settings['country'] ] . '<br><br>You can change this setting at:<br><a href="' . get_admin_url( null, 'admin.php?page=wc-settings' ) . '">WooCommerce -> Settings -> General -> Store Address</a>', 'wc-taxjar' ),
+                        'title'   => __( 'Debug Log', 'wc-taxjar' ),
+                        'type'    => 'checkbox',
+                        'default' => 'no',
+                        'desc'    => __( 'Log events such as API requests.', 'wc-taxjar' ),
+                        'id'      => 'woocommerce_taxjar-integration_settings[debug]',
                     );
                     $settings[] = array(
                         'type' => 'sectionend',
                     );
-                } else {
                     $settings[] = array(
                         'type' => 'title',
-                    );
-                    $settings[] = array(
-                        'title'    => __( 'Ship From Address', 'wc-taxjar' ),
-                        'type'     => 'text',
-                        'desc'     => __( 'Enter the street address where your store ships from.', 'wc-taxjar' ),
-                        'desc_tip' => true,
-                        'default'  => '',
-                        'id'       => 'woocommerce_taxjar-integration_settings[store_street]'
-                    );
-                    $settings[] = array(
-                        'title'       => __( 'Ship From City', 'wc-taxjar' ),
-                        'type'        => 'text',
-                        'description' => __( 'Enter the city where your store ships from.', 'wc-taxjar' ),
-                        'desc_tip'    => true,
-                        'default'     => '',
-                        'id'          => 'woocommerce_taxjar-integration_settings[store_city]'
-                    );
-                    $settings[] = array(
-                        'title'       => __( 'Ship From State', 'wc-taxjar' ),
-                        'type'        => 'title',
-                        'description' => __( 'We have automatically detected your ship from state as being ' . $store_settings['state'] . '.<br>You can change this setting at <a href="' . get_admin_url( null, 'admin.php?page=wc-settings' ) . '">WooCommerce -> Settings -> General -> Base Location</a>', 'wc-taxjar' ),
-                        'class'       => 'input-text disabled regular-input',
-                        'id'          => 'woocommerce_taxjar-integration_settings[store_state]'
-                    );
-                    $settings[] = array(
-                        'title'       => __( 'Ship From Postcode / ZIP', 'wc-taxjar' ),
-                        'type'        => 'text',
-                        'description' => __( 'Enter the zip code from which your store ships products.', 'wc-taxjar' ),
-                        'desc_tip'    => true,
-                        'default'     => '',
-                        'id'          => 'woocommerce_taxjar-integration_settings[store_postcode]'
-                    );
-                    $settings[] = array(
-                        'title'       => __( 'Ship From Country', 'wc-taxjar' ),
-                        'type'        => 'hidden',
-                        'description' => __( 'We have automatically detected your ship from country as being ' . $store_settings['country'] . '.<br>You can change this setting at <a href="' . get_admin_url( null, 'admin.php?page=wc-settings' ) . '">WooCommerce -> Settings -> General -> Base Location</a>', 'wc-taxjar' ),
-                        'class'       => 'input-text disabled regular-input',
-                        'id'          => 'woocommerce_taxjar-integration_settings[store_country]'
+                        'desc' => __( 'If you find TaxJar for WooCommerce useful, please rate us <a href="https://wordpress.org/support/plugin/taxjar-simplified-taxes-for-woocommerce/reviews/#new-post" target="_blank">&#9733;&#9733;&#9733;&#9733;&#9733;</a>. Thank you!', 'wc-taxjar' ),
                     );
                     $settings[] = array(
@@ -424 +480 @@
                     );
                 }
-
-                $settings[] = array(
-                    'type' => 'title',
+            }
+
+            return apply_filters( 'woocommerce_get_settings_' . $this->id, $settings );
+        }
+
+        /**
+         * Get sections.
+         *
+         * @return array
+         */
+        public function get_sections() {
+            $sections = array(
+                ''                     => __( 'Settings', 'woocommerce' ),
+                'transaction_backfill' => __( 'Transaction Backfill', 'wc-taxjar' ),
+                'sync_queue'           => __( 'Sync Queue', 'wc-taxjar' ),
+            );
+            return apply_filters( 'woocommerce_get_sections_' . $this->id, $sections );
+        }
+
+        /**
+         * Save settings.
+         */
+        public function save() {
+            $settings = $this->get_settings();
+            WC_Admin_Settings::save_fields( $settings );
+        }
+
+        /**
+         * Prints debug info to wp-content/uploads/wc-logs/taxjar-*.log
+         *
+         * @return void
+         */
+        public function _log( $message ) {
+            do_action( 'taxjar_log', $message );
+            if ( $this->debug ) {
+                if ( ! isset( $this->log ) ) {
+                    $this->log = new WC_Logger();
+                }
+                if ( is_array( $message ) || is_object( $message ) ) {
+                    $this->log->add( 'taxjar', print_r( $message, true ) );
+                } else {
+                    $this->log->add( 'taxjar', $message );
+                }
+            }
+        }
+
+        /**
+         * Slightly altered copy and paste of private function in WC_Tax class file
+         */
+        public function _get_wildcard_postcodes( $postcode ) {
+            $postcodes = array( '*', strtoupper( $postcode ) );
+
+            if ( version_compare( WC()->version, '2.4.0', '>=' ) ) {
+                $postcodes = array( '*', strtoupper( $postcode ), strtoupper( $postcode ) . '*' );
+            }
+
+            $postcode_length   = strlen( $postcode );
+            $wildcard_postcode = strtoupper( $postcode );
+
+            for ( $i = 0; $i < $postcode_length; $i ++ ) {
+                $wildcard_postcode = substr( $wildcard_postcode, 0, -1 );
+                $postcodes[]       = $wildcard_postcode . '*';
+            }
+            return $postcodes;
+        }
+
+        /**
+         * Calculate sales tax using SmartCalcs
+         *
+         * @return array|boolean
+         */
+        public function calculate_tax( $options = array() ) {
+            $this->_log( ':::: TaxJar Plugin requested ::::' );
+
+            // Process $options array and turn them into variables
+            $options = is_array( $options ) ? $options : array();
+
+            $calculation_data = array_replace_recursive(
+                array(
+                    'to_country'      => null,
+                    'to_state'        => null,
+                    'to_zip'          => null,
+                    'to_city'         => null,
+                    'to_street'       => null,
+                    'shipping_amount' => null, // WC()->shipping->shipping_total
+                    'line_items'      => null,
+                    'customer_id'     => 0,
+                    'exemption_type'  => '',
+                ),
+                $options
+            );
+
+            $taxes = array(
+                'freight_taxable' => 1,
+                'has_nexus'       => 0,
+                'line_items'      => array(),
+                'rate_ids'        => array(),
+                'tax_rate'        => 0,
+            );
+
+            // Strict conditions to be met before API call can be conducted
+            if (
+                empty( $calculation_data['to_country'] ) ||
+                empty( $calculation_data['to_zip'] ) ||
+                ( empty( $calculation_data['line_items'] ) && ( 0 === $calculation_data['shipping_amount'] ) )
+                ) {
+                return false;
+            }
+
+            // validate customer exemption before sending API call
+            if ( is_object( WC()->customer ) ) {
+                if ( WC()->customer->is_vat_exempt() ) {
+                    return false;
+                }
+            }
+
+            // Valid zip codes to prevent unnecessary API requests
+            if ( ! $this->is_postal_code_valid( $calculation_data['to_country'], $calculation_data['to_state'], $calculation_data['to_zip'] ) ) {
+                return false;
+            }
+
+            $taxjar_nexus = new WC_Taxjar_Nexus( $this );
+
+            if ( ! $taxjar_nexus->has_nexus_check( $calculation_data['to_country'], $calculation_data['to_state'] ) ) {
+                $this->_log( ':::: Order not shipping to nexus area ::::' );
+                return false;
+            }
+
+            $calculation_data['to_zip'] = explode( ',', $calculation_data['to_zip'] );
+            $calculation_data['to_zip'] = array_shift( $calculation_data['to_zip'] );
+
+            $store_settings                      = $this->get_store_settings();
+            $from_country                        = $store_settings['country'];
+            $from_state                          = $store_settings['state'];
+            $from_zip                            = $store_settings['postcode'];
+            $from_city                           = $store_settings['city'];
+            $from_street                         = $store_settings['street'];
+            $calculation_data['shipping_amount'] = is_null( $calculation_data['shipping_amount'] ) ? 0.0 : $calculation_data['shipping_amount'];
+
+            $this->_log( ':::: TaxJar API called ::::' );
+
+            $url = $this->uri . 'taxes';
+
+            $body = array(
+                'from_country' => $from_country,
+                'from_state'   => $from_state,
+                'from_zip'     => $from_zip,
+                'from_city'    => $from_city,
+                'from_street'  => $from_street,
+                'to_country'   => $calculation_data['to_country'],
+                'to_state'     => $calculation_data['to_state'],
+                'to_zip'       => $calculation_data['to_zip'],
+                'to_city'      => $calculation_data['to_city'],
+                'to_street'    => $calculation_data['to_street'],
+                'shipping'     => $calculation_data['shipping_amount'],
+                'plugin'       => 'woo',
+            );
+
+            if ( is_int( $calculation_data['customer_id'] ) ) {
+                if ( $calculation_data['customer_id'] > 0 ) {
+                    $body['customer_id'] = $calculation_data['customer_id'];
+                }
+            } else {
+                if ( ! empty( $calculation_data['customer_id'] ) ) {
+                    $body['customer_id'] = $calculation_data['customer_id'];
+                }
+            }
+
+            if ( ! empty( $calculation_data['exemption_type'] ) ) {
+                if ( self::is_valid_exemption_type( $calculation_data['exemption_type'] ) ) {
+                    $body['exemption_type'] = $calculation_data['exemption_type'];
+                }
+            }
+
+            // Either `amount` or `line_items` parameters are required to perform tax calculations.
+            if ( empty( $calculation_data['line_items'] ) ) {
+                $body['amount'] = 0.0;
+            } else {
+                $body['line_items'] = $calculation_data['line_items'];
+            }
+
+            $response = $this->smartcalcs_cache_request( wp_json_encode( $body ) );
+
+            if ( isset( $response ) ) {
+                // Log the response
+                $this->_log( 'Received: ' . $response['body'] );
+
+                // Decode Response
+                $taxjar_response = json_decode( $response['body'] );
+                $taxjar_response = $taxjar_response->tax;
+
+                // Update Properties based on Response
+                $taxes['freight_taxable'] = (int) $taxjar_response->freight_taxable;
+                $taxes['has_nexus']       = (int) $taxjar_response->has_nexus;
+                $taxes['shipping_rate']   = $taxjar_response->rate;
+
+                if ( ! empty( $taxjar_response->breakdown ) ) {
+
+                    if ( ! empty( $taxjar_response->breakdown->shipping ) ) {
+                        $taxes['shipping_rate'] = $taxjar_response->breakdown->shipping->combined_tax_rate;
+                    }
+
+                    if ( ! empty( $taxjar_response->breakdown->line_items ) ) {
+                        $calculation_data['line_items'] = array();
+                        foreach ( $taxjar_response->breakdown->line_items as $line_item ) {
+                            $calculation_data['line_items'][ $line_item->id ] = $line_item;
+                        }
+                        $taxes['line_items'] = $calculation_data['line_items'];
+                    }
+                }
+            }
+
+            // Remove taxes if they are set somehow and customer is exempt
+            if ( is_object( WC()->customer ) && WC()->customer->is_vat_exempt() ) {
+                WC()->cart->remove_taxes(); // Woo < 3.2
+            } elseif ( $taxes['has_nexus'] ) {
+                // Use Woo core to find matching rates for taxable address
+                $location = array(
+                    'to_country' => $calculation_data['to_country'],
+                    'to_state'   => $calculation_data['to_state'],
+                    'to_zip'     => $calculation_data['to_zip'],
+                    'to_city'    => $calculation_data['to_city'],
                 );
-                $settings[] = $this->download_orders->get_form_settings_field();
-                $settings[] = array(
-                    'title'   => __( 'Debug Log', 'wc-taxjar' ),
-                    'type'    => 'checkbox',
-                    'default' => 'no',
-                    'desc'    => __( 'Log events such as API requests.', 'wc-taxjar' ),
-                    'id'      => 'woocommerce_taxjar-integration_settings[debug]'
+
+                // Add line item tax rates
+                foreach ( $taxes['line_items'] as $line_item_key => $line_item ) {
+                    $line_item_key_chunks = explode( '-', $line_item_key );
+                    $product_id           = $line_item_key_chunks[0];
+                    $product              = wc_get_product( $product_id );
+
+                    if ( $product ) {
+                        $tax_class = $product->get_tax_class();
+                    } else {
+                        if ( isset( $this->backend_tax_classes[ $product_id ] ) ) {
+                            $tax_class = $this->backend_tax_classes[ $product_id ];
+                        }
+                    }
+
+                    if ( $line_item->combined_tax_rate ) {
+                        $taxes['rate_ids'][ $line_item_key ] = $this->create_or_update_tax_rate(
+                            $location,
+                            $line_item->combined_tax_rate * 100,
+                            $tax_class,
+                            $taxes['freight_taxable']
+                        );
+                    }
+                }
+
+                // Add shipping tax rate
+                $taxes['rate_ids']['shipping'] = $this->create_or_update_tax_rate(
+                    $location,
+                    $taxes['shipping_rate'] * 100,
+                    '',
+                    $taxes['freight_taxable']
                 );
-                $settings[] = array(
-                    'type' => 'sectionend',
+            } // End if().
+
+            return $taxes;
+        } // End calculate_tax().
+
+        /**
+         * Add or update a native WooCommerce tax rate
+         *
+         * @return void
+         */
+        public function create_or_update_tax_rate( $location, $rate, $tax_class = '', $freight_taxable = 1 ) {
+            $tax_rate = array(
+                'tax_rate_country'  => $location['to_country'],
+                'tax_rate_state'    => $location['to_state'],
+                'tax_rate_name'     => sprintf( '%s Tax', $location['to_state'] ),
+                'tax_rate_priority' => 1,
+                'tax_rate_compound' => false,
+                'tax_rate_shipping' => $freight_taxable,
+                'tax_rate'          => $rate,
+                'tax_rate_class'    => $tax_class,
+            );
+
+            $rate_lookup = array(
+                'country'   => $location['to_country'],
+                'state'     => $location['to_state'],
+                'postcode'  => $location['to_zip'],
+                'city'      => $location['to_city'],
+                'tax_class' => $tax_class,
+            );
+
+            if ( version_compare( WC()->version, '3.2.0', '>=' ) ) {
+                $rate_lookup['state'] = sanitize_key( $location['to_state'] );
+            }
+
+            $wc_rate = WC_Tax::find_rates( $rate_lookup );
+
+            if ( ! empty( $wc_rate ) ) {
+                $this->_log( ':: Tax Rate Found ::' );
+                $this->_log( $wc_rate );
+
+                // Get the existing ID
+                $rate_id = key( $wc_rate );
+
+                // Update Tax Rates with TaxJar rates ( rates might be coming from a cached taxjar rate )
+                $this->_log( ':: Updating Tax Rate To ::' );
+                $this->_log( $tax_rate );
+
+                WC_Tax::_update_tax_rate( $rate_id, $tax_rate );
+            } else {
+                // Insert a rate if we did not find one
+                $this->_log( ':: Adding New Tax Rate ::' );
+                $this->_log( $tax_rate );
+                $rate_id = WC_Tax::_insert_tax_rate( $tax_rate );
+                WC_Tax::_update_tax_rate_postcodes( $rate_id, wc_clean( $location['to_zip'] ) );
+                WC_Tax::_update_tax_rate_cities( $rate_id, wc_clean( $location['to_city'] ) );
+            }
+
+            $this->_log( 'Tax Rate ID Set for ' . $rate_id );
+            return $rate_id;
+        }
+
+        public function smartcalcs_request( $json ) {
+            $response = apply_filters( 'taxjar_smartcalcs_request', false, $json );
+            if ( ! $response ) {
+                $url = $this->uri . 'taxes';
+                $this->_log( 'Requesting: ' . $this->uri . 'taxes - ' . $json );
+
+                $response = wp_remote_post(
+                    $url,
+                    array(
+                        'headers'    => array(
+                            'Authorization' => 'Token token="' . $this->settings['api_token'] . '"',
+                            'Content-Type'  => 'application/json',
+                        ),
+                        'user-agent' => $this->ua,
+                        'body'       => $json,
+                    )
                 );
-                $settings[] = array(
-                    'type' => 'title',
-                    'desc' => __( 'If you find TaxJar for WooCommerce useful, please rate us <a href="https://wordpress.org/support/plugin/taxjar-simplified-taxes-for-woocommerce/reviews/#new-post" target="_blank">&#9733;&#9733;&#9733;&#9733;&#9733;</a>. Thank you!', 'wc-taxjar' ),
-                );
-                $settings[] = array(
-                    'type' => 'sectionend',
-                );
-            }
-        }
-
-        return apply_filters( 'woocommerce_get_settings_' . $this->id, $settings );
-    }
-
-    /**
-     * Get sections.
-     *
-     * @return array
-     */
-    public function get_sections() {
-        $sections = array(
-            ''             => __( 'Settings', 'woocommerce' ),
-            'transaction_backfill'    => __( 'Transaction Backfill', 'wc-taxjar' ),
-            'sync_queue' => __( 'Sync Queue', 'wc-taxjar' ),
-        );
-        return apply_filters( 'woocommerce_get_sections_' . $this->id, $sections );
-    }
-
-    /**
-     * Save settings.
-     */
-    public function save() {
-        $settings = $this->get_settings();
-        WC_Admin_Settings::save_fields( $settings );
-    }
-
-    /**
-     * Prints debug info to wp-content/uploads/wc-logs/taxjar-*.log
-     *
-     * @return void
-     */
-    public function _log( $message ) {
-        do_action( 'taxjar_log', $message );
-        if ( $this->debug ) {
-            if ( ! isset( $this->log ) ) {
-                $this->log = new WC_Logger();
-            }
-            if ( is_array( $message ) || is_object( $message ) ) {
-                $this->log->add( 'taxjar', print_r( $message, true ) );
+            }
+
+            if ( is_wp_error( $response ) ) {
+                new WP_Error( 'request', __( 'There was an error retrieving the tax rates. Please check your server configuration.' ) );
+            } elseif ( 200 === $response['response']['code'] ) {
+                return $response;
             } else {
-                $this->log->add( 'taxjar', $message );
-            }
-        }
-    }
-
-    /**
-     * Slightly altered copy and paste of private function in WC_Tax class file
-     */
-    public function _get_wildcard_postcodes( $postcode ) {
-        $postcodes = array( '*', strtoupper( $postcode ) );
-
-        if ( version_compare( WC()->version, '2.4.0', '>=' ) ) {
-            $postcodes = array( '*', strtoupper( $postcode ), strtoupper( $postcode ) . '*' );
-        }
-
-        $postcode_length   = strlen( $postcode );
-        $wildcard_postcode = strtoupper( $postcode );
-
-        for ( $i = 0; $i < $postcode_length; $i ++ ) {
-            $wildcard_postcode = substr( $wildcard_postcode, 0, -1 );
-            $postcodes[] = $wildcard_postcode . '*';
-        }
-        return $postcodes;
-    }
-
-    /**
-     * Calculate sales tax using SmartCalcs
-     *
-     * @return void
-     */
-    public function calculate_tax( $options = array() ) {
-        $this->_log( ':::: TaxJar Plugin requested ::::' );
-
-        // Process $options array and turn them into variables
-        $options = is_array( $options ) ? $options : array();
-
-        extract( array_replace_recursive(array(
-            'to_country' => null,
-            'to_state' => null,
-            'to_zip' => null,
-            'to_city' => null,
-            'to_street' => null,
-            'shipping_amount' => null, // WC()->shipping->shipping_total
-            'line_items' => null,
-            'customer_id' => 0,
-            'exemption_type' => '',
-        ), $options) );
-
-        $taxes = array(
-            'freight_taxable' => 1,
-            'has_nexus' => 0,
-            'line_items' => array(),
-            'rate_ids' => array(),
-            'tax_rate' => 0,
-        );
-
-        // Strict conditions to be met before API call can be conducted
-        if (
-            empty( $to_country ) ||
-            empty( $to_zip ) ||
-            ( empty( $line_items ) && ( 0 == $shipping_amount ) )
-        ) {
-            return false;
-        }
-
-        // validate customer exemption before sending API call
-        if ( is_object( WC()->customer ) ) {
-            if ( WC()->customer->is_vat_exempt() ) {
-                return false;
-            }
-        }
-
-        // Valid zip codes to prevent unnecessary API requests
-        if ( ! $this->is_postal_code_valid( $to_country, $to_state, $to_zip ) ) {
-            return false;
-        }
-
-        $taxjar_nexus = new WC_Taxjar_Nexus( $this );
-
-        if ( ! $taxjar_nexus->has_nexus_check( $to_country, $to_state ) ) {
-            $this->_log( ':::: Order not shipping to nexus area ::::' );
-            return false;
-        }
-
-        $to_zip           = explode( ',' , $to_zip );
-        $to_zip           = array_shift( $to_zip );
-
-        $store_settings   = $this->get_store_settings();
-        $from_country     = $store_settings['country'];
-        $from_state       = $store_settings['state'];
-        $from_zip         = $store_settings['postcode'];
-        $from_city        = $store_settings['city'];
-        $from_street      = $store_settings['street'];
-        $shipping_amount  = is_null( $shipping_amount ) ? 0.0 : $shipping_amount;
-
-        $this->_log( ':::: TaxJar API called ::::' );
-
-        $url = $this->uri . 'taxes';
-
-        $body = array(
-            'from_country' => $from_country,
-            'from_state' => $from_state,
-            'from_zip' => $from_zip,
-            'from_city' => $from_city,
-            'from_street' => $from_street,
-            'to_country' => $to_country,
-            'to_state' => $to_state,
-            'to_zip' => $to_zip,
-            'to_city' => $to_city,
-            'to_street' => $to_street,
-            'shipping' => $shipping_amount,
-            'plugin' => 'woo',
-        );
-
-        if ( is_int ( $customer_id ) ) {
-            if ( $customer_id > 0 ) {
-                $body[ 'customer_id' ] = $customer_id;
-            }
-        } else {
-            if ( ! empty( $customer_id ) ) {
-                $body[ 'customer_id' ] = $customer_id;
-            }
-        }
-
-        if ( ! empty( $exemption_type ) ) {
-            if ( self::is_valid_exemption_type( $exemption_type ) ) {
-                $body[ 'exemption_type' ] = $exemption_type;
-            }
-        }
-
-        // Either `amount` or `line_items` parameters are required to perform tax calculations.
-        if ( empty( $line_items ) ) {
-            $body['amount'] = 0.0;
-        } else {
-            $body['line_items'] = $line_items;
-        }
-
-        $response = $this->smartcalcs_cache_request( wp_json_encode( $body ) );
-
-        if ( isset( $response ) ) {
-            // Log the response
-            $this->_log( 'Received: ' . $response['body'] );
-
-            // Decode Response
-            $taxjar_response          = json_decode( $response['body'] );
-            $taxjar_response          = $taxjar_response->tax;
-
-            // Update Properties based on Response
-            $taxes['freight_taxable']    = (int) $taxjar_response->freight_taxable;
-            $taxes['has_nexus']          = (int) $taxjar_response->has_nexus;
-            $taxes['shipping_rate']      = $taxjar_response->rate;
-
-            if ( ! empty( $taxjar_response->breakdown ) ) {
-
-                if ( ! empty( $taxjar_response->breakdown->shipping ) ) {
-                    $taxes['shipping_rate'] = $taxjar_response->breakdown->shipping->combined_tax_rate;
-                }
-
-                if ( ! empty( $taxjar_response->breakdown->line_items ) ) {
-                    $line_items = array();
-                    foreach ( $taxjar_response->breakdown->line_items as $line_item ) {
-                        $line_items[ $line_item->id ] = $line_item;
+                $this->_log( 'Received (' . $response['response']['code'] . '): ' . $response['body'] );
+            }
+        }
+
+        public function smartcalcs_cache_request( $json ) {
+            $cache_key = 'tj_tax_' . hash( 'md5', $json );
+            $response  = get_transient( $cache_key );
+
+            if ( false === $response ) {
+                $response = $this->smartcalcs_request( $json );
+
+                if ( 200 === wp_remote_retrieve_response_code( $response ) ) {
+                    set_transient( $cache_key, $response, $this->cache_time );
+                }
+            }
+
+            return $response;
+        }
+
+        /**
+         * Calculate tax / totals using TaxJar at checkout
+         *
+         * @return void
+         */
+        public function calculate_totals( $wc_cart_object ) {
+            // If outside of cart and checkout page or within mini-cart, skip calculations
+            if ( ( ! is_cart() && ! is_checkout() ) || ( is_cart() && is_ajax() ) ) {
+                return;
+            }
+
+            // prevent unnecessary calls to API during add to cart process
+            if ( doing_action( 'woocommerce_add_to_cart' ) ) {
+                return;
+            }
+
+            $cart_taxes     = array();
+            $cart_tax_total = 0;
+
+            foreach ( $wc_cart_object->coupons as $coupon ) {
+                if ( method_exists( $coupon, 'get_id' ) ) { // Woo 3.0+
+                    $limit_usage_qty = get_post_meta( $coupon->get_id(), 'limit_usage_to_x_items', true );
+
+                    if ( $limit_usage_qty ) {
+                        $coupon->set_limit_usage_to_x_items( $limit_usage_qty );
                     }
-                    $taxes['line_items'] = $line_items;
-                }
-            }
-        }
-
-        // Remove taxes if they are set somehow and customer is exempt
-        if ( is_object( WC()->customer ) && WC()->customer->is_vat_exempt() ) {
-            WC()->cart->remove_taxes(); // Woo < 3.2
-        } elseif ( $taxes['has_nexus'] ) {
-            // Use Woo core to find matching rates for taxable address
-            $location = array(
-                'to_country' => $to_country,
-                'to_state' => $to_state,
-                'to_zip' => $to_zip,
-                'to_city' => $to_city,
+                }
+            }
+
+            $address        = $this->get_address( $wc_cart_object );
+            $line_items     = $this->get_line_items( $wc_cart_object );
+            $shipping_total = $wc_cart_object->get_shipping_total();
+
+            $customer_id = 0;
+            if ( is_object( WC()->customer ) ) {
+                $customer_id = apply_filters( 'taxjar_get_customer_id', WC()->customer->get_id(), WC()->customer );
+            }
+
+            $exemption_type = apply_filters( 'taxjar_cart_exemption_type', '', $wc_cart_object );
+
+            $taxes = $this->calculate_tax(
+                array(
+                    'to_country'      => $address['to_country'],
+                    'to_zip'          => $address['to_zip'],
+                    'to_state'        => $address['to_state'],
+                    'to_city'         => $address['to_city'],
+                    'to_street'       => $address['to_street'],
+                    'shipping_amount' => $shipping_total,
+                    'line_items'      => $line_items,
+                    'customer_id'     => $customer_id,
+                    'exemption_type'  => $exemption_type,
+                )
             );
 
-            // Add line item tax rates
-            foreach ( $taxes['line_items'] as $line_item_key => $line_item ) {
-                $line_item_key_chunks = explode( '-', $line_item_key );
-                $product_id = $line_item_key_chunks[0];
-                $product = wc_get_product( $product_id );
-
-                if ( $product ) {
-                    $tax_class = $product->get_tax_class();
-                } else {
-                    if ( isset( $this->backend_tax_classes[$product_id] ) ) {
-                        $tax_class = $this->backend_tax_classes[$product_id];
+            if ( false === $taxes ) {
+                return;
+            }
+
+            $this->response_rate_ids   = $taxes['rate_ids'];
+            $this->response_line_items = $taxes['line_items'];
+
+            if ( isset( $this->response_line_items ) ) {
+                foreach ( $this->response_line_items as $response_line_item_key => $response_line_item ) {
+                    $line_item = $this->get_line_item( $response_line_item_key, $line_items );
+
+                    if ( isset( $line_item ) ) {
+                        $this->response_line_items[ $response_line_item_key ]->line_total = ( $line_item['unit_price'] * $line_item['quantity'] ) - $line_item['discount'];
                     }
                 }
-
-                if ( $line_item->combined_tax_rate ) {
-                    $taxes['rate_ids'][ $line_item_key ] = $this->create_or_update_tax_rate(
-                        $location,
-                        $line_item->combined_tax_rate * 100,
-                        $tax_class,
-                        $taxes['freight_taxable']
-                    );
-                }
-            }
-
-            // Add shipping tax rate
-            $taxes['rate_ids']['shipping'] = $this->create_or_update_tax_rate(
-                $location,
-                $taxes['shipping_rate'] * 100,
-                '',
-                $taxes['freight_taxable']
+            }
+
+            foreach ( $wc_cart_object->get_cart() as $cart_item_key => $cart_item ) {
+                $product       = $cart_item['data'];
+                $line_item_key = $product->get_id() . '-' . $cart_item_key;
+                if ( isset( $taxes['line_items'][ $line_item_key ] ) && ! $taxes['line_items'][ $line_item_key ]->combined_tax_rate ) {
+                    if ( method_exists( $product, 'set_tax_status' ) ) {
+                        $product->set_tax_status( 'none' ); // Woo 3.0+
+                    } else {
+                        $product->tax_status = 'none'; // Woo 2.6
+                    }
+                }
+            }
+
+            // ensure fully exempt orders have no tax on shipping
+            if ( ! $taxes['freight_taxable'] ) {
+                foreach ( $wc_cart_object->get_shipping_packages() as $package_key => $package ) {
+                    $shipping_for_package = WC()->session->get( 'shipping_for_package_' . $package_key );
+                    if ( ! empty( $shipping_for_package['rates'] ) ) {
+                        foreach ( $shipping_for_package['rates'] as $shipping_rate ) {
+                            if ( method_exists( $shipping_rate, 'set_taxes' ) ) {
+                                $shipping_rate->set_taxes( array() );
+                            } else {
+                                $shipping_rate->taxes = array();
+                            }
+                            WC()->session->set( 'shipping_for_package_' . $package_key, $shipping_for_package );
+                        }
+                    }
+                }
+            }
+
+            if ( class_exists( 'WC_Cart_Totals' ) ) { // Woo 3.2+
+                do_action( 'woocommerce_cart_reset', $wc_cart_object, false );
+                do_action( 'woocommerce_before_calculate_totals', $wc_cart_object );
+
+                // Prevent WooCommerce Smart Coupons from removing the applied gift card amount when calculating totals the second time
+                if ( WC()->cart->smart_coupon_credit_used ) {
+                    WC()->cart->smart_coupon_credit_used = array();
+                }
+
+                new WC_Cart_Totals( $wc_cart_object );
+                remove_action( 'woocommerce_after_calculate_totals', array( $this, 'calculate_totals' ), 20 );
+                do_action( 'woocommerce_after_calculate_totals', $wc_cart_object );
+                add_action( 'woocommerce_after_calculate_totals', array( $this, 'calculate_totals' ), 20 );
+            } else {
+                remove_action( 'woocommerce_calculate_totals', array( $this, 'calculate_totals' ), 20 );
+                $wc_cart_object->calculate_totals();
+                add_action( 'woocommerce_calculate_totals', array( $this, 'calculate_totals' ), 20 );
+            }
+        }
+
+        /**
+         * Calculate tax / totals using TaxJar for backend orders
+         *
+         * @return void
+         */
+        public function calculate_backend_totals( $order_id ) {
+            $order      = wc_get_order( $order_id );
+            $address    = $this->get_backend_address();
+            $line_items = $this->get_backend_line_items( $order );
+
+            if ( method_exists( $order, 'get_shipping_total' ) ) {
+                $shipping = $order->get_shipping_total(); // Woo 3.0+
+            } else {
+                $shipping = $order->get_total_shipping(); // Woo 2.6
+            }
+
+            $customer_id = apply_filters( 'taxjar_get_customer_id', isset( $_POST['customer_user'] ) ? wc_clean( $_POST['customer_user'] ) : 0 );
+
+            $exemption_type = apply_filters( 'taxjar_order_calculation_exemption_type', '', $order );
+
+            $taxes = $this->calculate_tax(
+                array(
+                    'to_country'      => $address['to_country'],
+                    'to_state'        => $address['to_state'],
+                    'to_zip'          => $address['to_zip'],
+                    'to_city'         => $address['to_city'],
+                    'to_street'       => $address['to_street'],
+                    'shipping_amount' => $shipping,
+                    'line_items'      => $line_items,
+                    'customer_id'     => $customer_id,
+                    'exemption_type'  => $exemption_type,
+                )
             );
-        } // End if().
-
-        return $taxes;
-    } // End calculate_tax().
-
-    /**
-     * Add or update a native WooCommerce tax rate
-     *
-     * @return void
-     */
-    public function create_or_update_tax_rate( $location, $rate, $tax_class = '', $freight_taxable = 1 ) {
-        $tax_rate = array(
-            'tax_rate_country' => $location['to_country'],
-            'tax_rate_state' => $location['to_state'],
-            'tax_rate_name' => sprintf( "%s Tax", $location['to_state'] ),
-            'tax_rate_priority' => 1,
-            'tax_rate_compound' => false,
-            'tax_rate_shipping' => $freight_taxable,
-            'tax_rate' => $rate,
-            'tax_rate_class' => $tax_class,
-        );
-
-        $rate_lookup = array(
-            'country' => $location['to_country'],
-            'state' => $location['to_state'],
-            'postcode' => $location['to_zip'],
-            'city' => $location['to_city'],
-            'tax_class' => $tax_class,
-        );
-
-        if ( version_compare( WC()->version, '3.2.0', '>=' ) ) {
-            $rate_lookup['state'] = sanitize_key( $location['to_state'] );
-        }
-
-        $wc_rate = WC_Tax::find_rates( $rate_lookup );
-
-        if ( ! empty( $wc_rate ) ) {
-            $this->_log( ':: Tax Rate Found ::' );
-            $this->_log( $wc_rate );
-
-            // Get the existing ID
-            $rate_id = key( $wc_rate );
-
-            // Update Tax Rates with TaxJar rates ( rates might be coming from a cached taxjar rate )
-            $this->_log( ':: Updating Tax Rate To ::' );
-            $this->_log( $tax_rate );
-
-            WC_Tax::_update_tax_rate( $rate_id, $tax_rate );
-        } else {
-            // Insert a rate if we did not find one
-            $this->_log( ':: Adding New Tax Rate ::' );
-            $this->_log( $tax_rate );
-            $rate_id = WC_Tax::_insert_tax_rate( $tax_rate );
-            WC_Tax::_update_tax_rate_postcodes( $rate_id, wc_clean( $location['to_zip'] ) );
-            WC_Tax::_update_tax_rate_cities( $rate_id, wc_clean( $location['to_city'] ) );
-        }
-
-        $this->_log( 'Tax Rate ID Set for ' . $rate_id );
-        return $rate_id;
-    }
-
-    public function smartcalcs_request( $json ) {
-        $response = apply_filters( 'taxjar_smartcalcs_request', false, $json );
-        if ( ! $response ) {
-            $url = $this->uri . 'taxes';
-            $this->_log( 'Requesting: ' . $this->uri . 'taxes - ' . $json );
-
-            $response = wp_remote_post( $url, array(
-                'headers' => array(
-                                'Authorization' => 'Token token="' . $this->settings['api_token'] . '"',
-                                'Content-Type' => 'application/json',
-                            ),
-                'user-agent' => $this->ua,
-                'body' => $json,
-            ) );
-        }
-
-        if ( is_wp_error( $response ) ) {
-            new WP_Error( 'request', __( 'There was an error retrieving the tax rates. Please check your server configuration.' ) );
-        } elseif ( 200 == $response['response']['code'] ) {
-            return $response;
-        } else {
-            $this->_log( 'Received (' . $response['response']['code'] . '): ' . $response['body'] );
-        }
-    }
-
-    public function smartcalcs_cache_request( $json ) {
-        $cache_key = 'tj_tax_' . hash( 'md5', $json );
-        $response  = get_transient( $cache_key );
-
-        if ( false === $response ) {
-            $response = $this->smartcalcs_request( $json );
-
-            if ( 200 == wp_remote_retrieve_response_code( $response ) ) {
-                set_transient( $cache_key, $response, $this->cache_time );
-            }
-        }
-
-        return $response;
-    }
-
-    /**
-     * Calculate tax / totals using TaxJar at checkout
-     *
-     * @return void
-     */
-    public function calculate_totals( $wc_cart_object ) {
-        // If outside of cart and checkout page or within mini-cart, skip calculations
-        if ( ( ! is_cart() && ! is_checkout() ) || ( is_cart() && is_ajax() ) ) {
-            return;
-        }
-
-        // prevent unnecessary calls to API during add to cart process
-        if ( doing_action( 'woocommerce_add_to_cart' ) ) {
-            return;
-        }
-
-        $cart_taxes = array();
-        $cart_tax_total = 0;
-
-        foreach ( $wc_cart_object->coupons as $coupon ) {
-            if ( method_exists( $coupon, 'get_id' ) ) { // Woo 3.0+
-                $limit_usage_qty = get_post_meta( $coupon->get_id(), 'limit_usage_to_x_items', true );
-
-                if ( $limit_usage_qty ) {
-                    $coupon->set_limit_usage_to_x_items( $limit_usage_qty );
-                }
-            }
-        }
-
-        $address = $this->get_address( $wc_cart_object );
-        $line_items = $this->get_line_items( $wc_cart_object );
-        $shipping_total = $wc_cart_object->get_shipping_total();
-
-        $customer_id = 0;
-        if ( is_object( WC()->customer ) ) {
-            $customer_id = apply_filters( 'taxjar_get_customer_id', WC()->customer->get_id(), WC()->customer );
-        }
-
-        $exemption_type = apply_filters( 'taxjar_cart_exemption_type', '', $wc_cart_object );
-
-        $taxes = $this->calculate_tax( array(
-            'to_country' => $address['to_country'],
-            'to_zip' => $address['to_zip'],
-            'to_state' => $address['to_state'],
-            'to_city' => $address['to_city'],
-            'to_street' => $address['to_street'],
-            'shipping_amount' => $shipping_total,
-            'line_items' => $line_items,
-            'customer_id' => $customer_id,
-            'exemption_type' => $exemption_type,
-        ) );
-
-        if ( $taxes === false ) {
-            return;
-        }
-
-        $this->response_rate_ids = $taxes['rate_ids'];
-        $this->response_line_items = $taxes['line_items'];
-
-        if ( isset( $this->response_line_items ) ) {
-            foreach ( $this->response_line_items as $response_line_item_key => $response_line_item ) {
-                $line_item = $this->get_line_item( $response_line_item_key, $line_items );
-
-                if ( isset( $line_item ) ) {
-                    $this->response_line_items[ $response_line_item_key ]->line_total = ( $line_item['unit_price'] * $line_item['quantity'] ) - $line_item['discount'];
-                }
-            }
-        }
-
-        foreach ( $wc_cart_object->get_cart() as $cart_item_key => $cart_item ) {
-            $product = $cart_item['data'];
-            $line_item_key = $product->get_id() . '-' . $cart_item_key;
-            if ( isset( $taxes['line_items'][ $line_item_key ] ) && ! $taxes['line_items'][ $line_item_key ]->combined_tax_rate ) {
-                if ( method_exists( $product, 'set_tax_status' ) ) {
-                    $product->set_tax_status( 'none' ); // Woo 3.0+
-                } else {
-                    $product->tax_status = 'none'; // Woo 2.6
-                }
-            }
-        }
-
-        // ensure fully exempt orders have no tax on shipping
-        if ( ! $taxes[ 'freight_taxable' ] ) {
-            foreach ( $wc_cart_object->get_shipping_packages() as $package_key => $package ) {
-                $shipping_for_package = WC()->session->get( 'shipping_for_package_' . $package_key );
-                if ( ! empty( $shipping_for_package['rates'] ) ) {
-                    foreach ( $shipping_for_package['rates'] as $shipping_rate ) {
-                        if ( method_exists( $shipping_rate, 'set_taxes' ) ) {
-                            $shipping_rate->set_taxes( array() );
-                        } else {
-                            $shipping_rate->taxes = array();
-                        }
-                        WC()->session->set( 'shipping_for_package_' . $package_key, $shipping_for_package );
+
+            if ( false === $taxes ) {
+                return;
+            }
+
+            if ( class_exists( 'WC_Order_Item_Tax' ) ) { // Add tax rates manually for Woo 3.0+
+                foreach ( $order->get_items() as $item_key => $item ) {
+                    $product_id    = $item->get_product_id();
+                    $line_item_key = $product_id . '-' . $item_key;
+
+                    if ( isset( $taxes['rate_ids'][ $line_item_key ] ) ) {
+                        $rate_id  = $taxes['rate_ids'][ $line_item_key ];
+                        $item_tax = new WC_Order_Item_Tax();
+                        $item_tax->set_rate( $rate_id );
+                        $item_tax->set_order_id( $order_id );
+                        $item_tax->save();
                     }
                 }
-            }
-        }
-
-        if ( class_exists( 'WC_Cart_Totals' ) ) { // Woo 3.2+
-            do_action( 'woocommerce_cart_reset', $wc_cart_object, false );
-            do_action( 'woocommerce_before_calculate_totals', $wc_cart_object );
-
-            // Prevent WooCommerce Smart Coupons from removing the applied gift card amount when calculating totals the second time
-            if ( WC()->cart->smart_coupon_credit_used ) {
-                WC()->cart->smart_coupon_credit_used = array();
-            }
-
-            new WC_Cart_Totals( $wc_cart_object );
-            remove_action( 'woocommerce_after_calculate_totals', array( $this, 'calculate_totals' ), 20 );
-            do_action( 'woocommerce_after_calculate_totals', $wc_cart_object );
-            add_action( 'woocommerce_after_calculate_totals', array( $this, 'calculate_totals' ), 20 );
-        } else {
-            remove_action( 'woocommerce_calculate_totals', array( $this, 'calculate_totals' ), 20 );
-            $wc_cart_object->calculate_totals();
-            add_action( 'woocommerce_calculate_totals', array( $this, 'calculate_totals' ), 20 );
-        }
-    }
-
-    /**
-     * Calculate tax / totals using TaxJar for backend orders
-     *
-     * @return void
-     */
-    public function calculate_backend_totals( $order_id ) {
-        $order = wc_get_order( $order_id );
-        $address = $this->get_backend_address();
-        $line_items = $this->get_backend_line_items( $order );
-
-        if ( method_exists( $order, 'get_shipping_total' ) ) {
-            $shipping = $order->get_shipping_total(); // Woo 3.0+
-        } else {
-            $shipping = $order->get_total_shipping(); // Woo 2.6
-        }
-
-        $customer_id = apply_filters( 'taxjar_get_customer_id', isset( $_POST[ 'customer_user' ] ) ? wc_clean( $_POST[ 'customer_user' ] ) : 0 );
-
-        $exemption_type = apply_filters( 'taxjar_order_calculation_exemption_type', '', $order );
-
-        $taxes = $this->calculate_tax( array(
-            'to_country' => $address['to_country'],
-            'to_state' => $address['to_state'],
-            'to_zip' => $address['to_zip'],
-            'to_city' => $address['to_city'],
-            'to_street' => $address['to_street'],
-            'shipping_amount' => $shipping,
-            'line_items' => $line_items,
-            'customer_id' => $customer_id,
-            'exemption_type' => $exemption_type,
-        ) );
-
-        if ( $taxes === false ) {
-            return;
-        }
-
-        if ( class_exists( 'WC_Order_Item_Tax' ) ) { // Add tax rates manually for Woo 3.0+
+            } else { // Recalculate tax for Woo 2.6 to apply new tax rates
+                if ( class_exists( 'WC_AJAX' ) ) {
+                    remove_action( 'woocommerce_before_save_order_items', array( $this, 'calculate_backend_totals' ), 20 );
+                    if ( check_ajax_referer( 'calc-totals', 'security', false ) ) {
+                        WC_AJAX::calc_line_taxes();
+                    }
+                    add_action( 'woocommerce_before_save_order_items', array( $this, 'calculate_backend_totals' ), 20 );
+                }
+            }
+        }
+
+        /**
+         * Triggers tax calculation on both renewal order and subscription when creating a new renewal order
+         *
+         * @return WC_Order
+         */
+        public function calculate_renewal_order_totals( $order, $subscription, $type ) {
+
+            if ( ! is_object( $subscription ) ) {
+                $subscription = wcs_get_subscription( $subscription );
+            }
+
+            // Ensure payment gateway allows order totals to be changed
+            if ( ! $subscription->payment_method_supports( 'subscription_amount_changes' ) ) {
+                return $order;
+            }
+
+            $this->calculate_order_tax( $order );
+
+            // must calculate tax on subscription in order for my account to properly display the correct tax
+            $this->calculate_order_tax( $subscription );
+
+            $order->calculate_totals();
+            $subscription->calculate_totals();
+
+            return $order;
+        }
+
+        /**
+         * Calculate tax on an order
+         *
+         * @return null
+         */
+        public function calculate_order_tax( $order ) {
+            $address    = $this->get_address_from_order( $order );
+            $line_items = $this->get_backend_line_items( $order );
+            $shipping   = $order->get_shipping_total(); // Woo 3.0+
+
+            $customer_id = apply_filters( 'taxjar_get_customer_id', $order->get_customer_id() );
+
+            $exemption_type = apply_filters( 'taxjar_order_calculation_exemption_type', '', $order );
+
+            $taxes = $this->calculate_tax(
+                array(
+                    'to_country'      => $address['to_country'],
+                    'to_state'        => $address['to_state'],
+                    'to_zip'          => $address['to_zip'],
+                    'to_city'         => $address['to_city'],
+                    'to_street'       => $address['to_street'],
+                    'shipping_amount' => $shipping,
+                    'line_items'      => $line_items,
+                    'customer_id'     => $customer_id,
+                    'exemption_type'  => $exemption_type,
+                )
+            );
+
+            if ( false === $taxes ) {
+                return;
+            }
+
             foreach ( $order->get_items() as $item_key => $item ) {
-                $product_id = $item->get_product_id();
+                $product_id    = $item->get_product_id();
                 $line_item_key = $product_id . '-' . $item_key;
 
                 if ( isset( $taxes['rate_ids'][ $line_item_key ] ) ) {
-                    $rate_id = $taxes['rate_ids'][ $line_item_key ];
+                    $rate_id  = $taxes['rate_ids'][ $line_item_key ];
                     $item_tax = new WC_Order_Item_Tax();
                     $item_tax->set_rate( $rate_id );
-                    $item_tax->set_order_id( $order_id );
+                    $item_tax->set_order_id( $order->get_id() );
                     $item_tax->save();
                 }
             }
-        } else { // Recalculate tax for Woo 2.6 to apply new tax rates
-            if ( class_exists( 'WC_AJAX' ) ) {
-                remove_action( 'woocommerce_before_save_order_items', array( $this, 'calculate_backend_totals' ), 20 );
-                if ( check_ajax_referer( 'calc-totals', 'security', false ) ) {
-                    WC_AJAX::calc_line_taxes();
-                }
-                add_action( 'woocommerce_before_save_order_items', array( $this, 'calculate_backend_totals' ), 20 );
-            }
-        }
-    }
-
-    /**
-     * Triggers tax calculation on both renewal order and subscription when creating a new renewal order
-     *
-     * @return WC_Order
-     */
-    public function calculate_renewal_order_totals( $order, $subscription, $type ) {
-
-        if ( ! is_object( $subscription ) ) {
-            $subscription = wcs_get_subscription( $subscription );
-        }
-
-        // Ensure payment gateway allows order totals to be changed
-        if ( ! $subscription->payment_method_supports( 'subscription_amount_changes' ) ) {
-            return $order;
-        }
-
-        $this->calculate_order_tax( $order );
-
-        // must calculate tax on subscription in order for my account to properly display the correct tax
-        $this->calculate_order_tax( $subscription );
-
-        $order->calculate_totals();
-        $subscription->calculate_totals();
-
-        return $order;
-    }
-
-    /**
-     * Calculate tax on an order
-     *
-     * @return null
-     */
-    public function calculate_order_tax( $order ) {
-        $address = $this->get_address_from_order( $order );
-        $line_items = $this->get_backend_line_items( $order );
-        $shipping = $order->get_shipping_total(); // Woo 3.0+
-
-        $customer_id = apply_filters( 'taxjar_get_customer_id', $order->get_customer_id() );
-
-        $exemption_type = apply_filters( 'taxjar_order_calculation_exemption_type', '', $order );
-
-        $taxes = $this->calculate_tax( array(
-            'to_country' => $address[ 'to_country' ],
-            'to_state' => $address[ 'to_state' ],
-            'to_zip' => $address[ 'to_zip' ],
-            'to_city' => $address[ 'to_city' ],
-            'to_street' => $address[ 'to_street' ],
-            'shipping_amount' => $shipping,
-            'line_items' => $line_items,
-            'customer_id' => $customer_id,
-            'exemption_type' => $exemption_type,
-        ) );
-
-        if ( $taxes === false ) {
-            return;
-        }
-
-        foreach ( $order->get_items() as $item_key => $item ) {
-            $product_id = $item->get_product_id();
-            $line_item_key = $product_id . '-' . $item_key;
-
-            if ( isset( $taxes['rate_ids'][ $line_item_key ] ) ) {
-                $rate_id = $taxes['rate_ids'][ $line_item_key ];
-                $item_tax = new WC_Order_Item_Tax();
-                $item_tax->set_rate( $rate_id );
-                $item_tax->set_order_id( $order->get_id() );
-                $item_tax->save();
-            }
-        }
-    }
-
-    /**
-     * Get address details of customer at checkout
-     *
-     * @return array
-     */
-    protected function get_address() {
-        $taxable_address = $this->get_taxable_address();
-        $taxable_address = is_array( $taxable_address ) ? $taxable_address : array();
-
-        $to_country = isset( $taxable_address[0] ) && ! empty( $taxable_address[0] ) ? $taxable_address[0] : false;
-        $to_state = isset( $taxable_address[1] ) && ! empty( $taxable_address[1] ) ? $taxable_address[1] : false;
-        $to_zip = isset( $taxable_address[2] ) && ! empty( $taxable_address[2] ) ? $taxable_address[2] : false;
-        $to_city = isset( $taxable_address[3] ) && ! empty( $taxable_address[3] ) ? $taxable_address[3] : false;
-        $to_street = isset( $taxable_address[4] ) && ! empty( $taxable_address[4] ) ? $taxable_address[4] : false;
-
-        return array(
-            'to_country' => $to_country,
-            'to_state' => $to_state,
-            'to_zip' => $to_zip,
-            'to_city' => $to_city,
-            'to_street' => $to_street,
-        );
-    }
-
-    /**
-     * Get address details of customer for backend orders
-     *
-     * @return array
-     */
-    protected function get_backend_address() {
-        $to_country = isset( $_POST['country'] ) ? strtoupper( wc_clean( $_POST['country'] ) ) : false;
-        $to_state = isset( $_POST['state'] ) ? strtoupper( wc_clean( $_POST['state'] ) ) : false;
-        $to_zip = isset( $_POST['postcode'] ) ? strtoupper( wc_clean( $_POST['postcode'] ) ) : false;
-        $to_city = isset( $_POST['city'] ) ? strtoupper( wc_clean( $_POST['city'] ) ) : false;
-        $to_street = isset( $_POST['street'] ) ? strtoupper( wc_clean( $_POST['street'] ) ) : false;
-
-        return array(
-            'to_country' => $to_country,
-            'to_state' => $to_state,
-            'to_zip' => $to_zip,
-            'to_city' => $to_city,
-            'to_street' => $to_street,
-        );
-    }
-
-    /**
-     * Get ship to address from order object
-     *
-     * @return array
-     */
-    public function get_address_from_order( $order ) {
-        $address = $order->get_address( 'shipping' );
-        return array(
-            'to_country' => $address[ 'country' ],
-            'to_state' => $address[ 'state' ],
-            'to_zip' => $address[ 'postcode' ],
-            'to_city' => $address[ 'city' ],
-            'to_street' => $address[ 'address_1' ],
-        );
-    }
-
-    /**
-     * Get line items at checkout
-     *
-     * @return array
-     */
-    protected function get_line_items( $wc_cart_object ) {
-        $line_items = array();
-
-        foreach ( $wc_cart_object->get_cart() as $cart_item_key => $cart_item ) {
-            $product = $cart_item['data'];
-            $id = $product->get_id();
-            $quantity = $cart_item['quantity'];
-            $unit_price = wc_format_decimal( $product->get_price() );
-            $line_subtotal = wc_format_decimal( $cart_item['line_subtotal'] );
-            $discount = wc_format_decimal( $cart_item['line_subtotal'] - $cart_item['line_total'] );
-            $tax_code = self::get_tax_code_from_class( $product->get_tax_class() );
-
-            if ( ! $product->is_taxable() || 'zero-rate' == sanitize_title( $product->get_tax_class() ) ) {
-                $tax_code = '99999';
-            }
-
-            // Get WC Subscription sign-up fees for calculations
-            if ( class_exists( 'WC_Subscriptions_Cart' ) ) {
-                if ( 'none' == WC_Subscriptions_Cart::get_calculation_type() ) {
-                    $unit_price = WC_Subscriptions_Cart::set_subscription_prices_for_calculation( $unit_price, $product );
-                }
-            }
-
-            if ( $unit_price && $line_subtotal ) {
-                array_push($line_items, array(
-                    'id' => $id . '-' . $cart_item_key,
-                    'quantity' => $quantity,
-                    'product_tax_code' => $tax_code,
-                    'unit_price' => $unit_price,
-                    'discount' => $discount,
-                ));
-            }
-        }
-
-        return apply_filters( 'taxjar_cart_get_line_items', $line_items, $wc_cart_object, $this );
-    }
-
-    /**
-     * Get line items for backend orders
-     *
-     * @return array
-     */
-    protected function get_backend_line_items( $order ) {
-        $line_items = array();
-        $this->backend_tax_classes = array();
-
-        foreach ( $order->get_items() as $item_key => $item ) {
-            if ( is_object( $item ) ) { // Woo 3.0+
-                $id = $item->get_product_id();
-                $quantity = $item->get_quantity();
-                $unit_price = wc_format_decimal( $item->get_subtotal() / $quantity );
-                $discount = wc_format_decimal( $item->get_subtotal() - $item->get_total() );
-                $tax_class_name = $item->get_tax_class();
-                $tax_status = $item->get_tax_status();
-            }
-
-            $this->backend_tax_classes[$id] = $tax_class_name;
-            $tax_code = self::get_tax_code_from_class( $tax_class_name );
-
-            if ( 'taxable' !== $tax_status ) {
-                $tax_code = '99999';
-            }
-
-            if ( $unit_price ) {
-                array_push($line_items, array(
-                    'id' => $id . '-' . $item_key,
-                    'quantity' => $quantity,
-                    'product_tax_code' => $tax_code,
-                    'unit_price' => $unit_price,
-                    'discount' => $discount,
-                ));
-            }
-        }
-
-        return apply_filters( 'taxjar_order_calculation_get_line_items', $line_items, $order );
-    }
-
-    protected function get_line_item( $id, $line_items ) {
-        foreach ( $line_items as $line_item ) {
-            if ( $line_item['id'] === $id ) {
-                return $line_item;
-            }
-        }
-
-        return null;
-    }
-
-    /**
-     * Override Woo's native tax rates to handle multiple line items with the same tax rate
-     * within the same tax class with different rates due to exemption thresholds
-     *
-     * @return array
-     */
-    public function override_woocommerce_tax_rates( $taxes, $price, $rates ) {
-        if ( isset( $this->response_line_items ) && array_values( $rates ) ) {
-            // Get tax rate ID for current item
-            $keys = array_keys( $taxes );
-            $tax_rate_id = $keys[0];
+        }
+
+        /**
+         * Get address details of customer at checkout
+         *
+         * @return array
+         */
+        protected function get_address() {
+            $taxable_address = $this->get_taxable_address();
+            $taxable_address = is_array( $taxable_address ) ? $taxable_address : array();
+
+            $to_country = isset( $taxable_address[0] ) && ! empty( $taxable_address[0] ) ? $taxable_address[0] : false;
+            $to_state   = isset( $taxable_address[1] ) && ! empty( $taxable_address[1] ) ? $taxable_address[1] : false;
+            $to_zip     = isset( $taxable_address[2] ) && ! empty( $taxable_address[2] ) ? $taxable_address[2] : false;
+            $to_city    = isset( $taxable_address[3] ) && ! empty( $taxable_address[3] ) ? $taxable_address[3] : false;
+            $to_street  = isset( $taxable_address[4] ) && ! empty( $taxable_address[4] ) ? $taxable_address[4] : false;
+
+            return array(
+                'to_country' => $to_country,
+                'to_state'   => $to_state,
+                'to_zip'     => $to_zip,
+                'to_city'    => $to_city,
+                'to_street'  => $to_street,
+            );
+        }
+
+        /**
+         * Get address details of customer for backend orders
+         *
+         * @return array
+         */
+        protected function get_backend_address() {
+            $to_country = isset( $_POST['country'] ) ? strtoupper( wc_clean( $_POST['country'] ) ) : false;
+            $to_state   = isset( $_POST['state'] ) ? strtoupper( wc_clean( $_POST['state'] ) ) : false;
+            $to_zip     = isset( $_POST['postcode'] ) ? strtoupper( wc_clean( $_POST['postcode'] ) ) : false;
+            $to_city    = isset( $_POST['city'] ) ? strtoupper( wc_clean( $_POST['city'] ) ) : false;
+            $to_street  = isset( $_POST['street'] ) ? strtoupper( wc_clean( $_POST['street'] ) ) : false;
+
+            return array(
+                'to_country' => $to_country,
+                'to_state'   => $to_state,
+                'to_zip'     => $to_zip,
+                'to_city'    => $to_city,
+                'to_street'  => $to_street,
+            );
+        }
+
+        /**
+         * Get ship to address from order object
+         *
+         * @return array
+         */
+        public function get_address_from_order( $order ) {
+            $address = $order->get_address( 'shipping' );
+            return array(
+                'to_country' => $address['country'],
+                'to_state'   => $address['state'],
+                'to_zip'     => $address['postcode'],
+                'to_city'    => $address['city'],
+                'to_street'  => $address['address_1'],
+            );
+        }
+
+        /**
+         * Get line items at checkout
+         *
+         * @return array
+         */
+        public function get_line_items( $wc_cart_object ) {
             $line_items = array();
 
-            // Map line items using rate ID
-            foreach ( $this->response_rate_ids as $line_item_key => $rate_id ) {
-                if ( $rate_id == $tax_rate_id ) {
-                    $line_items[] = $line_item_key;
-                }
-            }
-
-            // Remove number precision if Woo 3.2+
-            if ( function_exists( 'wc_remove_number_precision' ) ) {
-                $price = wc_remove_number_precision( $price );
-            }
-
-            foreach ( $this->response_line_items as $line_item_key => $line_item ) {
-                // If line item belongs to rate and matches the price, manually set the tax
-                if ( in_array( $line_item_key, $line_items ) && round( $price, 2 ) == round( $line_item->line_total, 2 ) ) {
-                    if ( function_exists( 'wc_add_number_precision' ) ) {
-                        $taxes[ $tax_rate_id ] = wc_add_number_precision( $line_item->tax_collectable );
+            foreach ( $wc_cart_object->get_cart() as $cart_item_key => $cart_item ) {
+                $id            = $cart_item['data']->get_id();
+                $product       = wc_get_product( $id );
+                $quantity      = $cart_item['quantity'];
+                $unit_price    = wc_format_decimal( $product->get_price() );
+                $line_subtotal = wc_format_decimal( $cart_item['line_subtotal'] );
+                $discount      = wc_format_decimal( $cart_item['line_subtotal'] - $cart_item['line_total'] );
+                $tax_code      = self::get_tax_code_from_class( $product->get_tax_class() );
+
+                if ( ! $product->is_taxable() || 'zero-rate' === sanitize_title( $product->get_tax_class() ) ) {
+                    $tax_code = '99999';
+                }
+
+                // Get WC Subscription sign-up fees for calculations
+                if ( class_exists( 'WC_Subscriptions_Cart' ) ) {
+                    if ( 'none' === WC_Subscriptions_Cart::get_calculation_type() ) {
+                        $unit_price = WC_Subscriptions_Cart::set_subscription_prices_for_calculation( $unit_price, $product );
+                    }
+                }
+
+                if ( $unit_price && $line_subtotal ) {
+                    array_push(
+                        $line_items,
+                        array(
+                            'id'               => $id . '-' . $cart_item_key,
+                            'quantity'         => $quantity,
+                            'product_tax_code' => $tax_code,
+                            'unit_price'       => $unit_price,
+                            'discount'         => $discount,
+                        )
+                    );
+                }
+            }
+
+            return apply_filters( 'taxjar_cart_get_line_items', $line_items, $wc_cart_object, $this );
+        }
+
+        /**
+         * Get line items for backend orders
+         *
+         * @return array
+         */
+        protected function get_backend_line_items( $order ) {
+            $line_items                = array();
+            $this->backend_tax_classes = array();
+
+            foreach ( $order->get_items() as $item_key => $item ) {
+                if ( is_object( $item ) ) { // Woo 3.0+
+                    $id             = $item->get_product_id();
+                    $quantity       = $item->get_quantity();
+                    $unit_price     = wc_format_decimal( $item->get_subtotal() / $quantity );
+                    $discount       = wc_format_decimal( $item->get_subtotal() - $item->get_total() );
+                    $tax_class_name = $item->get_tax_class();
+                    $tax_status     = $item->get_tax_status();
+                }
+
+                $this->backend_tax_classes[ $id ] = $tax_class_name;
+                $tax_code                         = self::get_tax_code_from_class( $tax_class_name );
+
+                if ( 'taxable' !== $tax_status ) {
+                    $tax_code = '99999';
+                }
+
+                if ( $unit_price ) {
+                    array_push(
+                        $line_items,
+                        array(
+                            'id'               => $id . '-' . $item_key,
+                            'quantity'         => $quantity,
+                            'product_tax_code' => $tax_code,
+                            'unit_price'       => $unit_price,
+                            'discount'         => $discount,
+                        )
+                    );
+                }
+            }
+
+            return apply_filters( 'taxjar_order_calculation_get_line_items', $line_items, $order );
+        }
+
+        protected function get_line_item( $id, $line_items ) {
+            foreach ( $line_items as $line_item ) {
+                if ( $line_item['id'] === $id ) {
+                    return $line_item;
+                }
+            }
+
+            return null;
+        }
+
+        /**
+         * Override Woo's native tax rates to handle multiple line items with the same tax rate
+         * within the same tax class with different rates due to exemption thresholds
+         *
+         * @return array
+         */
+        public function override_woocommerce_tax_rates( $taxes, $price, $rates ) {
+            if ( isset( $this->response_line_items ) && array_values( $rates ) ) {
+                // Get tax rate ID for current item
+                $keys        = array_keys( $taxes );
+                $tax_rate_id = $keys[0];
+                $line_items  = array();
+
+                // Map line items using rate ID
+                foreach ( $this->response_rate_ids as $line_item_key => $rate_id ) {
+                    if ( $rate_id === $tax_rate_id ) {
+                        $line_items[] = $line_item_key;
+                    }
+                }
+
+                // Remove number precision if Woo 3.2+
+                if ( function_exists( 'wc_remove_number_precision' ) ) {
+                    $price = wc_remove_number_precision( $price );
+                }
+
+                foreach ( $this->response_line_items as $line_item_key => $line_item ) {
+                    // If line item belongs to rate and matches the price, manually set the tax
+                    if ( in_array( $line_item_key, $line_items, true ) && round( $price, 2 ) === round( $line_item->line_total, 2 ) ) {
+                        if ( function_exists( 'wc_add_number_precision' ) ) {
+                            $taxes[ $tax_rate_id ] = wc_add_number_precision( $line_item->tax_collectable );
+                        } else {
+                            $taxes[ $tax_rate_id ] = $line_item->tax_collectable;
+                        }
+                    }
+                }
+            }
+
+            return $taxes;
+        }
+
+        /**
+         * Set customer zip code and state to store if local shipping option set
+         *
+         * @return array
+         */
+        public function append_base_address_to_customer_taxable_address( $address ) {
+            $tax_based_on = '';
+
+            list( $country, $state, $postcode, $city, $street ) = array_pad( $address, 5, '' );
+
+            // See WC_Customer get_taxable_address()
+            // wc_get_chosen_shipping_method_ids() available since Woo 2.6.2+
+            if ( function_exists( 'wc_get_chosen_shipping_method_ids' ) ) {
+                if ( true === apply_filters( 'woocommerce_apply_base_tax_for_local_pickup', true ) && sizeof( array_intersect( wc_get_chosen_shipping_method_ids(), apply_filters( 'woocommerce_local_pickup_methods', array( 'legacy_local_pickup', 'local_pickup' ) ) ) ) > 0 ) {
+                    $tax_based_on = 'base';
+                }
+            } else {
+                if ( true === apply_filters( 'woocommerce_apply_base_tax_for_local_pickup', true ) && sizeof( array_intersect( WC()->session->get( 'chosen_shipping_methods', array() ), apply_filters( 'woocommerce_local_pickup_methods', array( 'legacy_local_pickup', 'local_pickup' ) ) ) ) > 0 ) {
+                    $tax_based_on = 'base';
+                }
+            }
+
+            if ( 'base' === $tax_based_on ) {
+                $store_settings = $this->get_store_settings();
+                $postcode       = $store_settings['postcode'];
+                $city           = strtoupper( $store_settings['city'] );
+                $street         = $store_settings['street'];
+            }
+
+            if ( '' !== $street ) {
+                return array( $country, $state, $postcode, $city, $street );
+            } else {
+                return array( $country, $state, $postcode, $city );
+            }
+        }
+
+        /**
+         * Allow street address to be passed when finding rates
+         *
+         * @param array $matched_tax_rates
+         * @param string $tax_class
+         * @return array
+         */
+        public function allow_street_address_for_matched_rates( $matched_tax_rates, $tax_class = '' ) {
+            $tax_class         = sanitize_title( $tax_class );
+            $location          = WC_Tax::get_tax_location( $tax_class );
+            $matched_tax_rates = array();
+
+            if ( sizeof( $location ) >= 4 ) {
+                list( $country, $state, $postcode, $city, $street ) = array_pad( $location, 5, '' );
+
+                $matched_tax_rates = WC_Tax::find_rates(
+                    array(
+                        'country'   => $country,
+                        'state'     => $state,
+                        'postcode'  => $postcode,
+                        'city'      => $city,
+                        'tax_class' => $tax_class,
+                    )
+                );
+            }
+
+            return $matched_tax_rates;
+        }
+
+        /**
+         * Get taxable address.
+         * @return array
+         */
+        public function get_taxable_address() {
+            $tax_based_on = get_option( 'woocommerce_tax_based_on' );
+
+            // Check shipping method at this point to see if we need special handling
+            // See WC_Customer get_taxable_address()
+            // wc_get_chosen_shipping_method_ids() available since Woo 2.6.2+
+            if ( function_exists( 'wc_get_chosen_shipping_method_ids' ) ) {
+                if ( true === apply_filters( 'woocommerce_apply_base_tax_for_local_pickup', true ) && sizeof( array_intersect( wc_get_chosen_shipping_method_ids(), apply_filters( 'woocommerce_local_pickup_methods', array( 'legacy_local_pickup', 'local_pickup' ) ) ) ) > 0 ) {
+                    $tax_based_on = 'base';
+                }
+            } else {
+                if ( true === apply_filters( 'woocommerce_apply_base_tax_for_local_pickup', true ) && sizeof( array_intersect( WC()->session->get( 'chosen_shipping_methods', array() ), apply_filters( 'woocommerce_local_pickup_methods', array( 'legacy_local_pickup', 'local_pickup' ) ) ) ) > 0 ) {
+                    $tax_based_on = 'base';
+                }
+            }
+
+            if ( 'base' === $tax_based_on ) {
+                $store_settings = $this->get_store_settings();
+                $country        = $store_settings['country'];
+                $state          = $store_settings['state'];
+                $postcode       = $store_settings['postcode'];
+                $city           = $store_settings['city'];
+                $street         = $store_settings['street'];
+            } elseif ( 'billing' === $tax_based_on ) {
+                $country  = WC()->customer->get_billing_country();
+                $state    = WC()->customer->get_billing_state();
+                $postcode = WC()->customer->get_billing_postcode();
+                $city     = WC()->customer->get_billing_city();
+                $street   = WC()->customer->get_billing_address();
+            } else {
+                $country  = WC()->customer->get_shipping_country();
+                $state    = WC()->customer->get_shipping_state();
+                $postcode = WC()->customer->get_shipping_postcode();
+                $city     = WC()->customer->get_shipping_city();
+                $street   = WC()->customer->get_shipping_address();
+            }
+
+            return apply_filters( 'woocommerce_customer_taxable_address', array( $country, $state, $postcode, $city, $street ) );
+        }
+
+        public function is_postal_code_valid( $to_country, $to_state, $to_zip ) {
+            $postal_regexes = array(
+                'US' => '/^\d{5}([ \-]\d{4})?$/',
+                'CA' => '/^[ABCEGHJKLMNPRSTVXY]\d[ABCEGHJ-NPRSTV-Z][ ]?\d[ABCEGHJ-NPRSTV-Z]\d$/',
+                'UK' => '/^GIR[ ]?0AA|((AB|AL|B|BA|BB|BD|BH|BL|BN|BR|BS|BT|CA|CB|CF|CH|CM|CO|CR|CT|CV|CW|DA|DD|DE|DG|DH|DL|DN|DT|DY|E|EC|EH|EN|EX|FK|FY|G|GL|GY|GU|HA|HD|HG|HP|HR|HS|HU|HX|IG|IM|IP|IV|JE|KA|KT|KW|KY|L|LA|LD|LE|LL|LN|LS|LU|M|ME|MK|ML|N|NE|NG|NN|NP|NR|NW|OL|OX|PA|PE|PH|PL|PO|PR|RG|RH|RM|S|SA|SE|SG|SK|SL|SM|SN|SO|SP|SR|SS|ST|SW|SY|TA|TD|TF|TN|TQ|TR|TS|TW|UB|W|WA|WC|WD|WF|WN|WR|WS|WV|YO|ZE)(\d[\dA-Z]?[ ]?\d[ABD-HJLN-UW-Z]{2}))|BFPO[ ]?\d{1,4}$/',
+                'FR' => '/^\d{2}[ ]?\d{3}$/',
+                'IT' => '/^\d{5}$/',
+                'DE' => '/^\d{5}$/',
+                'NL' => '/^\d{4}[ ]?[A-Z]{2}$/',
+                'ES' => '/^\d{5}$/',
+                'DK' => '/^\d{4}$/',
+                'SE' => '/^\d{3}[ ]?\d{2}$/',
+                'BE' => '/^\d{4}$/',
+                'IN' => '/^\d{6}$/',
+                'AU' => '/^\d{4}$/',
+            );
+
+            if ( isset( $postal_regexes[ $to_country ] ) ) {
+                // SmartCalcs api allows requests with no zip codes outside of the US, mark them as valid
+                if ( empty( $to_zip ) ) {
+                    if ( 'US' === $to_country ) {
+                        return false;
                     } else {
-                        $taxes[ $tax_rate_id ] = $line_item->tax_collectable;
+                        return true;
                     }
                 }
-            }
-        }
-
-        return $taxes;
-    }
-
-    /**
-     * Set customer zip code and state to store if local shipping option set
-     *
-     * @return array
-     */
-    public function append_base_address_to_customer_taxable_address( $address ) {
-        $tax_based_on = '';
-
-        list( $country, $state, $postcode, $city, $street ) = array_pad( $address, 5, '' );
-
-        // See WC_Customer get_taxable_address()
-        // wc_get_chosen_shipping_method_ids() available since Woo 2.6.2+
-        if ( function_exists( 'wc_get_chosen_shipping_method_ids' ) ) {
-            if ( true === apply_filters( 'woocommerce_apply_base_tax_for_local_pickup', true ) && sizeof( array_intersect( wc_get_chosen_shipping_method_ids(), apply_filters( 'woocommerce_local_pickup_methods', array( 'legacy_local_pickup', 'local_pickup' ) ) ) ) > 0 ) {
-                $tax_based_on = 'base';
-            }
-        } else {
-            if ( true === apply_filters( 'woocommerce_apply_base_tax_for_local_pickup', true ) && sizeof( array_intersect( WC()->session->get( 'chosen_shipping_methods', array() ), apply_filters( 'woocommerce_local_pickup_methods', array( 'legacy_local_pickup', 'local_pickup' ) ) ) ) > 0 ) {
-                $tax_based_on = 'base';
-            }
-        }
-
-        if ( 'base' == $tax_based_on ) {
-            $store_settings = $this->get_store_settings();
-            $postcode = $store_settings['postcode'];
-            $city = strtoupper( $store_settings['city'] );
-            $street = $store_settings['street'];
-        }
-
-        if ( '' != $street ) {
-            return array( $country, $state, $postcode, $city, $street );
-        } else {
-            return array( $country, $state, $postcode, $city );
-        }
-    }
-
-    /**
-     * Allow street address to be passed when finding rates
-     *
-     * @param array $matched_tax_rates
-     * @param string $tax_class
-     * @return array
-     */
-    public function allow_street_address_for_matched_rates( $matched_tax_rates, $tax_class = '' ) {
-        $tax_class         = sanitize_title( $tax_class );
-        $location          = WC_Tax::get_tax_location( $tax_class );
-        $matched_tax_rates = array();
-
-        if ( sizeof( $location ) >= 4 ) {
-            list( $country, $state, $postcode, $city, $street ) = array_pad( $location, 5, '' );
-
-            $matched_tax_rates = WC_Tax::find_rates( array(
-                'country'   => $country,
-                'state'     => $state,
-                'postcode'  => $postcode,
-                'city'      => $city,
-                'tax_class' => $tax_class,
-            ) );
-        }
-
-        return $matched_tax_rates;
-    }
-
-    /**
-     * Get taxable address.
-     * @return array
-     */
-    public function get_taxable_address() {
-        $tax_based_on = get_option( 'woocommerce_tax_based_on' );
-
-        // Check shipping method at this point to see if we need special handling
-        // See WC_Customer get_taxable_address()
-        // wc_get_chosen_shipping_method_ids() available since Woo 2.6.2+
-        if ( function_exists( 'wc_get_chosen_shipping_method_ids' ) ) {
-            if ( true === apply_filters( 'woocommerce_apply_base_tax_for_local_pickup', true ) && sizeof( array_intersect( wc_get_chosen_shipping_method_ids(), apply_filters( 'woocommerce_local_pickup_methods', array( 'legacy_local_pickup', 'local_pickup' ) ) ) ) > 0 ) {
-                $tax_based_on = 'base';
-            }
-        } else {
-            if ( true === apply_filters( 'woocommerce_apply_base_tax_for_local_pickup', true ) && sizeof( array_intersect( WC()->session->get( 'chosen_shipping_methods', array() ), apply_filters( 'woocommerce_local_pickup_methods', array( 'legacy_local_pickup', 'local_pickup' ) ) ) ) > 0 ) {
-                $tax_based_on = 'base';
-            }
-        }
-
-        if ( 'base' === $tax_based_on ) {
-            $store_settings = $this->get_store_settings();
-            $country  = $store_settings['country'];
-            $state    = $store_settings['state'];
-            $postcode = $store_settings['postcode'];
-            $city     = $store_settings['city'];
-            $street   = $store_settings['street'];
-        } elseif ( 'billing' === $tax_based_on ) {
-            $country  = WC()->customer->get_billing_country();
-            $state    = WC()->customer->get_billing_state();
-            $postcode = WC()->customer->get_billing_postcode();
-            $city     = WC()->customer->get_billing_city();
-            $street   = WC()->customer->get_billing_address();
-        } else {
-            $country  = WC()->customer->get_shipping_country();
-            $state    = WC()->customer->get_shipping_state();
-            $postcode = WC()->customer->get_shipping_postcode();
-            $city     = WC()->customer->get_shipping_city();
-            $street   = WC()->customer->get_shipping_address();
-        }
-
-        return apply_filters( 'woocommerce_customer_taxable_address', array( $country, $state, $postcode, $city, $street ) );
-    }
-
-    public function is_postal_code_valid( $to_country, $to_state, $to_zip ) {
-        $postal_regexes = array(
-            'US' => '/^\d{5}([ \-]\d{4})?$/',
-            'CA' => '/^[ABCEGHJKLMNPRSTVXY]\d[ABCEGHJ-NPRSTV-Z][ ]?\d[ABCEGHJ-NPRSTV-Z]\d$/',
-            'UK' => '/^GIR[ ]?0AA|((AB|AL|B|BA|BB|BD|BH|BL|BN|BR|BS|BT|CA|CB|CF|CH|CM|CO|CR|CT|CV|CW|DA|DD|DE|DG|DH|DL|DN|DT|DY|E|EC|EH|EN|EX|FK|FY|G|GL|GY|GU|HA|HD|HG|HP|HR|HS|HU|HX|IG|IM|IP|IV|JE|KA|KT|KW|KY|L|LA|LD|LE|LL|LN|LS|LU|M|ME|MK|ML|N|NE|NG|NN|NP|NR|NW|OL|OX|PA|PE|PH|PL|PO|PR|RG|RH|RM|S|SA|SE|SG|SK|SL|SM|SN|SO|SP|SR|SS|ST|SW|SY|TA|TD|TF|TN|TQ|TR|TS|TW|UB|W|WA|WC|WD|WF|WN|WR|WS|WV|YO|ZE)(\d[\dA-Z]?[ ]?\d[ABD-HJLN-UW-Z]{2}))|BFPO[ ]?\d{1,4}$/',
-            'FR' => '/^\d{2}[ ]?\d{3}$/',
-            'IT' => '/^\d{5}$/',
-            'DE' => '/^\d{5}$/',
-            'NL' => '/^\d{4}[ ]?[A-Z]{2}$/',
-            'ES' => '/^\d{5}$/',
-            'DK' => '/^\d{4}$/',
-            'SE' => '/^\d{3}[ ]?\d{2}$/',
-            'BE' => '/^\d{4}$/',
-            'IN' => '/^\d{6}$/',
-            'AU' => '/^\d{4}$/',
-        );
-
-        if ( isset( $postal_regexes[ $to_country ] ) ) {
-            // SmartCalcs api allows requests with no zip codes outside of the US, mark them as valid
-            if ( empty( $to_zip ) ) {
-                if ( $to_country == 'US' ) {
-                    return false;
-                } else {
-                    return true;
-                }
-            }
-
-            if ( preg_match( $postal_regexes[ $to_country ], $to_zip ) === 0 ) {
-                $this->_log( ':::: Postal code ' . $to_zip . ' is invalid for country ' . $to_country . ', API request stopped. ::::' );
-                return false;
-            }
-        }
-
-        return true;
-    }
-
-    /**
-     * Return either the post value or settings value of a key
-     *
-     * @return MIXED
-     */
-    public function post_or_setting( $key ) {
-        $val = null;
-
-        if ( isset( $_POST[ 'woocommerce_taxjar-integration_settings' ][ $key ] ) ) {
-            $val = $_POST[ 'woocommerce_taxjar-integration_settings' ][ $key ];
-        } elseif ( isset( $this->settings[ $key ] ) ) {
-            $val = $this->settings[ $key ];
-        }
-
-        if ( 'yes' == $val ) {
-            $val = 1;
-        }
-
-        if ( 'no' == $val ) {
-            $val = 0;
-        }
-
-        return $val;
-    }
-
-    /**
-     * Check if there is an existing WooCommerce 2.4 API Key
-     *
-     * @return boolean
-     */
-    private function existing_api_key() {
-        global $wpdb;
-        $sql = "SELECT count(key_id)
-            FROM {$wpdb->prefix}woocommerce_api_keys
-            LEFT JOIN $wpdb->users
-            ON {$wpdb->prefix}woocommerce_api_keys.user_id={$wpdb->users}.ID
-            WHERE ({$wpdb->users}.user_login LIKE '%taxjar%' OR {$wpdb->prefix}woocommerce_api_keys.description LIKE '%taxjar%');";
-        return ( $wpdb->get_var( $sql ) > 0 );
-    }
-
-    /**
-     * Generate Button HTML.
-     */
-    public function generate_button_html( $key, $data ) {
-        $field    = $this->plugin_id . $this->id . '_' . $key;
-        $defaults = array(
-            'class'             => 'button-secondary',
-            'css'               => '',
-            'custom_attributes' => array(),
-            'desc_tip'          => false,
-            'description'       => '',
-            'title'             => '',
-        );
-        $data = wp_parse_args( $data, $defaults );
-        ob_start();
-        ?>
+
+                if ( preg_match( $postal_regexes[ $to_country ], $to_zip ) === 0 ) {
+                    $this->_log( ':::: Postal code ' . $to_zip . ' is invalid for country ' . $to_country . ', API request stopped. ::::' );
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        /**
+         * Return either the post value or settings value of a key
+         *
+         * @return MIXED
+         */
+        public function post_or_setting( $key ) {
+            $val = null;
+
+            if ( isset( $_POST['woocommerce_taxjar-integration_settings'][ $key ] ) ) {
+                $val = $_POST['woocommerce_taxjar-integration_settings'][ $key ];
+            } elseif ( isset( $this->settings[ $key ] ) ) {
+                $val = $this->settings[ $key ];
+            }
+
+            if ( 'yes' === $val ) {
+                $val = 1;
+            }
+
+            if ( 'no' === $val ) {
+                $val = 0;
+            }
+
+            return $val;
+        }
+
+        /**
+         * Generate Button HTML.
+         */
+        public function generate_button_html( $key, $data ) {
+            $field    = $this->plugin_id . $this->id . '_' . $key;
+            $defaults = array(
+                'class'             => 'button-secondary',
+                'css'               => '',
+                'custom_attributes' => array(),
+                'desc_tip'          => false,
+                'description'       => '',
+                'title'             => '',
+            );
+            $data     = wp_parse_args( $data, $defaults );
+            ob_start();
+            ?>
         <tr valign="top">
             <th scope="row" class="titledesc">
@@ -1454 +1492 @@
             </td>
         </tr>
-        <?php
-        return ob_get_clean();
+            <?php
+            return ob_get_clean();
+        }
+
+        /**
+         * Sanitize our settings
+         */
+        public function sanitize_settings( $value, $option ) {
+            parse_str( $option['id'], $option_name_array );
+            $option_name  = current( array_keys( $option_name_array ) );
+            $setting_name = key( $option_name_array[ $option_name ] );
+
+            if ( in_array( $setting_name, array( 'store_postcode', 'store_city', 'store_street' ), true ) ) {
+                return wc_clean( $value );
+            }
+
+            if ( 'api_token' === $setting_name ) {
+                return strtolower( wc_clean( $value ) );
+            }
+
+            if ( 'taxjar_download' === $setting_name ) {
+                return $this->download_orders->validate_taxjar_download_field( $setting_name );
+            }
+
+            return $value;
+        }
+
+        /**
+         * Gets the store's settings and returns them
+         *
+         * @return array
+         */
+        public function get_store_settings() {
+            $store_address  = get_option( 'woocommerce_store_address' ) ? get_option( 'woocommerce_store_address' ) : $this->settings['store_street'];
+            $store_city     = get_option( 'woocommerce_store_city' ) ? get_option( 'woocommerce_store_city' ) : $this->settings['store_city'];
+            $store_country  = explode( ':', get_option( 'woocommerce_default_country' ) );
+            $store_postcode = get_option( 'woocommerce_store_postcode' ) ? get_option( 'woocommerce_store_postcode' ) : $this->settings['store_postcode'];
+
+            $store_settings = array(
+                'street'   => $store_address,
+                'city'     => $store_city,
+                'state'    => null,
+                'country'  => $store_country[0],
+                'postcode' => $store_postcode,
+            );
+
+            if ( isset( $store_country[1] ) ) {
+                $store_settings['state'] = $store_country[1];
+            }
+
+            return apply_filters( 'taxjar_store_settings', $store_settings, $this->settings );
+        }
+
+        /**
+         * Gets the store's settings and returns them
+         *
+         * @return void
+         */
+        public function taxjar_admin_menu() {
+            // Simple shortcut menu item under WooCommerce
+            add_submenu_page( 'woocommerce', __( 'TaxJar Settings', 'woocommerce' ), __( 'TaxJar', 'woocommerce' ), 'manage_woocommerce', 'admin.php?page=wc-settings&tab=taxjar-integration' );
+        }
+
+        /**
+         * Gets the value for a seting from POST given a key or returns false if box not checked
+         *
+         * @param mixed $key
+         * @return mixed $value
+         */
+        public function get_value_from_post( $key ) {
+            if ( isset( $_POST[ $this->plugin_id . $this->id . '_settings' ][ $key ] ) ) {
+                return $_POST[ $this->plugin_id . $this->id . '_settings' ][ $key ];
+            } else {
+                return false;
+            }
+        }
+
+        /**
+         * Display errors by overriding the display_errors() method
+         * @see display_errors()
+         */
+        public function display_errors() {
+            $error_key_values = array(
+                'shop_not_linked' => 'There was an error linking this store to your TaxJar account. Please contact [email protected]',
+            );
+
+            foreach ( $this->errors as $key => $value ) {
+                $message = $error_key_values[ $value ];
+                echo "<div class=\"error\"><p>$message</p></div>";
+            }
+        }
+
+        /**
+         * Output TaxJar message above tax configuration screen
+         */
+        public function output_sections_before() {
+            echo '<div class="updated taxjar-notice"><p><b>Powered by <a href="https://www.taxjar.com" target="_blank">TaxJar</a></b> ― Your tax rates and settings are automatically configured below.</p><p><a href="admin.php?page=wc-settings&tab=integration&section=taxjar-integration" class="button-primary">Configure TaxJar</a> &nbsp; <a href="https://www.taxjar.com/contact/" class="button" target="_blank">Help &amp; Support</a></p></div>';
+        }
+
+        /**
+         * Checks if currently on the WooCommerce new order page
+         *
+         * @return boolean
+         */
+        public function on_order_page() {
+            global $pagenow;
+            return ( in_array( $pagenow, array( 'post-new.php' ), true ) && isset( $_GET['post_type'] ) && 'shop_order' === $_GET['post_type'] );
+        }
+
+        /**
+         * Checks if currently on the TaxJar settings page
+         *
+         * @return boolean
+         */
+        public function on_settings_page() {
+            return ( isset( $_GET['page'] ) && 'wc-settings' === $_GET['page'] && isset( $_GET['tab'] ) && 'taxjar-integration' === $_GET['tab'] );
+        }
+
+        /**
+         * Admin Assets
+         */
+        public function load_taxjar_admin_assets() {
+            // Add CSS that hides some elements that are known to cause problems
+            wp_enqueue_style( 'taxjar-admin-style', plugin_dir_url( __FILE__ ) . 'css/admin.css' );
+
+            // Load Javascript for TaxJar settings page
+            wp_register_script( 'wc-taxjar-admin', plugin_dir_url( __FILE__ ) . '/js/wc-taxjar-admin.js' );
+
+            wp_localize_script(
+                'wc-taxjar-admin',
+                'woocommerce_taxjar_admin',
+                array(
+                    'ajax_url'                   => admin_url( 'admin-ajax.php' ),
+                    'transaction_backfill_nonce' => wp_create_nonce( 'taxjar-transaction-backfill' ),
+                    'update_nexus_nonce'         => wp_create_nonce( 'taxjar-update-nexus' ),
+                    'current_user'               => get_current_user_id(),
+                    'integration_uri'            => $this->integration_uri,
+                    'connect_url'                => $this->get_connect_url(),
+                    'app_url'                    => untrailingslashit( $this->app_uri ),
+                )
+            );
+
+            wp_enqueue_script( 'wc-taxjar-admin', array( 'jquery' ) );
+
+            wp_enqueue_script( 'jquery-ui-datepicker' );
+            wp_enqueue_style( 'jquery-ui-datepicker' );
+        }
+
+        /**
+         * Generates TaxJar connect popup url
+         *
+         * @return string - TaxJar connect popup url
+         */
+        public function get_connect_url() {
+            $connect_url  = $this->app_uri . 'smartcalcs/connect/woo/?store=' . urlencode( get_bloginfo( 'url' ) );
+            $connect_url .= '&plugin=woo&version=' . WC_Taxjar::$version;
+            return esc_url( $connect_url );
+        }
+
+        /**
+         * Admin New Order Assets
+         */
+        public function load_taxjar_admin_new_order_assets() {
+            if ( ! $this->on_order_page() ) {
+                return;
+            }
+
+            // Load Javascript for WooCommerce new order page
+            wp_register_script( 'wc-taxjar-order', plugin_dir_url( __FILE__ ) . '/js/wc-taxjar-order.js' );
+            wp_enqueue_script( 'wc-taxjar-order', array( 'jquery' ) );
+        }
+
+        static function is_valid_exemption_type( $exemption_type ) {
+            $valid_types = array( 'wholesale', 'government', 'other', 'non_exempt' );
+            return in_array( $exemption_type, $valid_types, true );
+        }
+
+        /**
+         * Parse tax code from product
+         *
+         * @return string - tax code
+         */
+        static function get_tax_code_from_class( $tax_class ) {
+            $tax_class = explode( '-', $tax_class );
+            $tax_code  = '';
+
+            if ( isset( $tax_class ) ) {
+                $tax_code = end( $tax_class );
+            }
+
+            return strtoupper( $tax_code );
+        }
+
+        /**
+         * Create user agent header
+         *
+         * @return string - user agent header
+         */
+        static function get_ua_header() {
+            $curl_version = '';
+            if ( function_exists( 'curl_version' ) ) {
+                $curl_version = curl_version();
+                $curl_version = $curl_version['version'] . '; ' . $curl_version['ssl_version'];
+            }
+
+            $php_version       = phpversion();
+            $taxjar_version    = WC_Taxjar::$version;
+            $woo_version       = WC()->version;
+            $wordpress_version = get_bloginfo( 'version' );
+            $site_url          = get_bloginfo( 'url' );
+            $user_agent        = "TaxJar/WooCommerce (PHP $php_version; cURL $curl_version; WordPress $wordpress_version; WooCommerce $woo_version) WC_Taxjar/$taxjar_version $site_url";
+            return $user_agent;
+        }
+
     }
 
-    /**
-     * Sanitize our settings
-     */
-    public function sanitize_settings( $value, $option ) {
-        parse_str( $option['id'], $option_name_array );
-        $option_name  = current( array_keys( $option_name_array ) );
-        $setting_name = key( $option_name_array[ $option_name ] );
-
-        if ( in_array( $setting_name, array( 'store_postcode', 'store_city', 'store_street' ) ) ) {
-            return wc_clean( $value );
-        }
-
-        if ( $setting_name == 'api_token' ) {
-            return strtolower( wc_clean( $value ) );
-        }
-
-        if ( $setting_name == 'taxjar_download' ) {
-            return $value = $this->download_orders->validate_taxjar_download_field( $setting_name );
-        }
-
-        return $value;
-    }
-
-    /**
-     * Gets the store's settings and returns them
-     *
-     * @return array
-     */
-    public function get_store_settings() {
-        $store_address = get_option( 'woocommerce_store_address' ) ? get_option( 'woocommerce_store_address' ) : $this->settings['store_street'];
-        $store_city = get_option( 'woocommerce_store_city' ) ? get_option( 'woocommerce_store_city' ) : $this->settings['store_city'];
-        $store_country = explode( ':', get_option( 'woocommerce_default_country' ) );
-        $store_postcode = get_option( 'woocommerce_store_postcode' ) ? get_option( 'woocommerce_store_postcode' ) : $this->settings['store_postcode'];
-
-        $store_settings = array(
-            'street' => $store_address,
-            'city' => $store_city,
-            'state' => null,
-            'country' => $store_country[0],
-            'postcode' => $store_postcode,
-        );
-
-        if ( isset( $store_country[1] ) ) {
-            $store_settings['state'] = $store_country[1];
-        }
-
-        return apply_filters( 'taxjar_store_settings', $store_settings, $this->settings );
-    }
-
-    /**
-     * Gets the store's settings and returns them
-     *
-     * @return void
-     */
-    public function taxjar_admin_menu() {
-        // Simple shortcut menu item under WooCommerce
-        add_submenu_page( 'woocommerce', __( 'TaxJar Settings', 'woocommerce' ), __( 'TaxJar', 'woocommerce' ) , 'manage_woocommerce', 'admin.php?page=wc-settings&tab=taxjar-integration' );
-    }
-
-    /**
-     * Gets the value for a seting from POST given a key or returns false if box not checked
-     *
-     * @param mixed $key
-     * @return mixed $value
-     */
-    public function get_value_from_post( $key ) {
-        if ( isset( $_POST[ $this->plugin_id . $this->id . '_settings' ][ $key ] ) ) {
-            return $_POST[ $this->plugin_id . $this->id . '_settings' ][ $key ];
-        } else {
-            return false;
-        }
-    }
-
-    /**
-     * Display errors by overriding the display_errors() method
-     * @see display_errors()
-     */
-    public function display_errors() {
-        $error_key_values = array(
-            'shop_not_linked' => 'There was an error linking this store to your TaxJar account. Please contact [email protected]',
-        );
-
-        foreach ( $this->errors as $key => $value ) {
-            $message = $error_key_values[ $value ];
-            echo "<div class=\"error\"><p>$message</p></div>";
-        }
-    }
-
-    /**
-     * Output TaxJar message above tax configuration screen
-     */
-    public function output_sections_before() {
-        echo '<div class="updated taxjar-notice"><p><b>Powered by <a href="https://www.taxjar.com" target="_blank">TaxJar</a></b> ― Your tax rates and settings are automatically configured below.</p><p><a href="admin.php?page=wc-settings&tab=integration&section=taxjar-integration" class="button-primary">Configure TaxJar</a> &nbsp; <a href="https://www.taxjar.com/contact/" class="button" target="_blank">Help &amp; Support</a></p></div>';
-    }
-
-    /**
-     * Checks if currently on the WooCommerce new order page
-     *
-     * @return boolean
-     */
-    public function on_order_page() {
-        global $pagenow;
-        return ( in_array( $pagenow, array( 'post-new.php' ) ) && isset( $_GET['post_type'] ) && 'shop_order' == $_GET['post_type'] );
-    }
-
-    /**
-     * Checks if currently on the TaxJar settings page
-     *
-     * @return boolean
-     */
-    public function on_settings_page() {
-        return ( isset( $_GET['page'] ) && 'wc-settings' == $_GET['page'] && isset( $_GET['tab'] ) && 'taxjar-integration' == $_GET['tab'] );
-    }
-
-    /**
-     * Admin Assets
-     */
-    public function load_taxjar_admin_assets() {
-        // Add CSS that hides some elements that are known to cause problems
-        wp_enqueue_style( 'taxjar-admin-style', plugin_dir_url( __FILE__ ) . 'css/admin.css' );
-
-        // Load Javascript for TaxJar settings page
-        wp_register_script( 'wc-taxjar-admin', plugin_dir_url( __FILE__ ) . '/js/wc-taxjar-admin.js' );
-
-        wp_localize_script(
-            'wc-taxjar-admin',
-            'woocommerce_taxjar_admin',
-            array(
-                'ajax_url'                      => admin_url( 'admin-ajax.php' ),
-                'transaction_backfill_nonce'    => wp_create_nonce( 'taxjar-transaction-backfill' ),
-                'update_nexus_nonce'            => wp_create_nonce( 'taxjar-update-nexus' ),
-                'current_user'                  => get_current_user_id(),
-                'integration_uri'               => $this->integration_uri,
-                'connect_url'                   => $this->get_connect_url(),
-                'app_url'                       => untrailingslashit( $this->app_uri )
-            )
-        );
-
-        wp_enqueue_script( 'wc-taxjar-admin' , array( 'jquery' ) );
-
-        wp_enqueue_script( 'jquery-ui-datepicker' );
-        wp_enqueue_style( 'jquery-ui-datepicker' );
-    }
-
-     /**
-      * Generates TaxJar connect popup url
-      *
-      * @return string - TaxJar connect popup url
-      */
-    public function get_connect_url() {
-        $connect_url = $this->app_uri . 'smartcalcs/connect/woo/?store=' . urlencode( get_bloginfo( 'url' ) );
-        $connect_url .= '&plugin=woo&version=' . WC_Taxjar::$version;
-        return esc_url( $connect_url );
-    }
-
-    /**
-     * Admin New Order Assets
-     */
-    public function load_taxjar_admin_new_order_assets() {
-        if ( ! $this->on_order_page() ) {
-            return;
-        }
-
-        // Load Javascript for WooCommerce new order page
-        wp_register_script( 'wc-taxjar-order', plugin_dir_url( __FILE__ ) . '/js/wc-taxjar-order.js' );
-        wp_enqueue_script( 'wc-taxjar-order' , array( 'jquery' ) );
-    }
-
-    static function is_valid_exemption_type( $exemption_type ) {
-        $valid_types = array( 'wholesale', 'government', 'other', 'non_exempt' );
-        return in_array( $exemption_type, $valid_types );
-    }
-
-    /**
-     * Parse tax code from product
-     *
-     * @param $product - WC_Product
-     * @return string - tax code
-     */
-    static function get_tax_code_from_class( $tax_class ) {
-        $tax_class = explode( '-', $tax_class );
-        $tax_code = '';
-
-        if ( isset( $tax_class ) ) {
-            $tax_code = end( $tax_class );
-        }
-
-        return strtoupper( $tax_code );
-    }
-
-    /**
-     * Create user agent header
-     *
-     * @return string - user agent header
-     */
-    static function get_ua_header() {
-        $curl_version = '';
-        if ( function_exists( 'curl_version' ) ) {
-            $curl_version = curl_version();
-            $curl_version = $curl_version['version'] . '; ' . $curl_version['ssl_version'];
-        }
-
-        $php_version = phpversion();
-        $taxjar_version = WC_Taxjar::$version;
-        $woo_version = WC()->version;
-        $wordpress_version = get_bloginfo( 'version' );
-        $site_url = get_bloginfo( 'url' );
-        $user_agent = "TaxJar/WooCommerce (PHP $php_version; cURL $curl_version; WordPress $wordpress_version; WooCommerce $woo_version) WC_Taxjar/$taxjar_version $site_url";
-        return $user_agent;
-    }
-
-}
-
 endif;

taxjar-simplified-taxes-for-woocommerce/trunk/readme.txt

@@ -3 +3 @@
 Tags: woocommerce, taxjar, tax, taxes, sales tax, tax calculation, sales tax compliance, sales tax filing
 Requires at least: 4.2
-Tested up to: 5.5.1
-Stable tag: 3.2.3
+Tested up to: 5.6.0
+Stable tag: 3.2.4
 License: GPLv2 or later
 URI: http://www.gnu.org/licenses/gpl-2.0.html
-WC requires at least: 3.2.0
-WC tested up to: 4.5.2
+WC requires at least: 3.6.0
+WC tested up to: 4.8.0
 
 Trusted by more than 20,000 businesses, TaxJar’s award-winning solution makes it easy to automate sales tax reporting and filing, and determine economic nexus with a single click.
@@ -96 +96 @@
 
 == Changelog ==
+
+= 3.2.4 (2020-12-15)
+* Fix occasional missing PTC from subscription orders
+* Fix issues that prevented exempt customers from syncing to TaxJar
+* WooCommerce 4.8.0 and WordPress 5.6 support
 
 = 3.2.3 (2020-09-28)

taxjar-simplified-taxes-for-woocommerce/trunk/taxjar-woocommerce.php

@@ -4 +4 @@
  * Plugin URI: https://www.taxjar.com/woocommerce-sales-tax-plugin/
  * Description: Save hours every month by putting your sales tax on autopilot. Automated, multi-state sales tax calculation, collection, and filing.
- * Version: 3.2.3
+ * Version: 3.2.4
  * Author: TaxJar
  * Author URI: https://www.taxjar.com
- * WC requires at least: 3.2.0
- * WC tested up to: 4.5.2
+ * WC requires at least: 3.6.0
+ * WC tested up to: 4.8.0
  *
  * Copyright: © 2014-2019 TaxJar. TaxJar is a trademark of TPS Unlimited, Inc.
@@ -43 +43 @@
 final class WC_Taxjar {
 
-    static $version = '3.2.3';
-    public static $minimum_woocommerce_version = '3.2.0';
+    static $version = '3.2.4';
+    public static $minimum_woocommerce_version = '3.6.0';
 
     /**