diff --git a/CHANGELOG.md b/CHANGELOG.md
index f80518c..459a697 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 2022-09-02 4.4.8
+* Fix a critical bug when working with taxes
+
 ## 2022-08-10 4.4.7
 * Add support for payment method on delivery
 
diff --git a/VERSION b/VERSION
index 3401474..bc30b06 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.4.7
\ No newline at end of file
+4.4.8
\ No newline at end of file
diff --git a/src/include/class-wc-retailcrm-history.php b/src/include/class-wc-retailcrm-history.php
index 77c4318..34bb4a2 100644
--- a/src/include/class-wc-retailcrm-history.php
+++ b/src/include/class-wc-retailcrm-history.php
@@ -342,7 +342,7 @@ if (!class_exists('WC_Retailcrm_History')) :
             }
 
             if (wc_tax_enabled()) {
-                $rate = getShippingRates();
+                $rate = getShippingRate();
 
                 $shipping->set_total($this->getDeliveryCost($order, $rate));
             } else {
@@ -882,7 +882,7 @@ if (!class_exists('WC_Retailcrm_History')) :
                     }
 
                     if (wc_tax_enabled()) {
-                        $rate = getShippingRates();
+                        $rate = getShippingRate();
 
                         $shipping->set_total($this->getDeliveryCost($order, $rate));
                     } else {
diff --git a/src/include/class-wc-retailcrm-orders.php b/src/include/class-wc-retailcrm-orders.php
index 66f516b..e786137 100644
--- a/src/include/class-wc-retailcrm-orders.php
+++ b/src/include/class-wc-retailcrm-orders.php
@@ -380,9 +380,13 @@ if (!class_exists('WC_Retailcrm_Orders')) :
                         : $shipping['total'];
 
                     if (wc_tax_enabled()) {
-                        $rate = getShippingRates();
+                        $shippingTaxClass = get_option('woocommerce_shipping_tax_class');
 
-                        if (!empty($rate)) {
+                        $rate = $shippingTaxClass == 'inherit'
+                            ? $this->getOrderItemRate($order)
+                            : getShippingRate();
+
+                        if ($rate !== null) {
                             $orderData['delivery']['vatRate'] = $rate;
                         }
                     }
@@ -502,6 +506,20 @@ if (!class_exists('WC_Retailcrm_Orders')) :
             return $this->payment;
         }
 
+        /**
+         * @return mixed
+         */
+        private function getOrderItemRate($order)
+        {
+            $orderItemTax = $order->get_taxes();
+
+            if (is_array($orderItemTax)) {
+                $orderItemTax = array_shift($orderItemTax);
+            }
+
+            return $orderItemTax instanceof WC_Order_Item_Tax ? $orderItemTax->get_rate_percent() : null;
+        }
+
         /**
          * Returns true if provided order is for corporate customer
          *
diff --git a/src/include/functions.php b/src/include/functions.php
index e8f4cf3..8b6b5fe 100644
--- a/src/include/functions.php
+++ b/src/include/functions.php
@@ -155,8 +155,12 @@ function validateUrl(string $url)
  *
  * @return mixed
  */
-function getShippingRates()
+function getShippingRate()
 {
+    if (!isset(WC()->cart)) {
+        return null;
+    }
+
     $shippingRates = WC_Tax::get_shipping_tax_rates();
 
     // Only one tax can be selected for shipping
diff --git a/src/readme.txt b/src/readme.txt
index 36a948d..37d0779 100644
--- a/src/readme.txt
+++ b/src/readme.txt
@@ -4,8 +4,8 @@ Donate link: https://www.simla.com
 Tags: Интеграция, Simla.com, simla
 Requires PHP: 5.6
 Requires at least: 5.3
-Tested up to: 5.9
-Stable tag: 4.4.7
+Tested up to: 6.0
+Stable tag: 4.4.8
 License: GPLv1 or later
 License URI: http://www.gnu.org/licenses/gpl-1.0.html
 
@@ -82,6 +82,9 @@ Asegúrate de tener una clave API específica para cada tienda. Las siguientes i
 
 
 == Changelog ==
+= 4.4.8 =
+* Fix a critical bug when working with taxes
+
 = 4.4.7 =
 * Add support for payment method on delivery
 
diff --git a/src/retailcrm.php b/src/retailcrm.php
index 01feee3..92fd4bc 100644
--- a/src/retailcrm.php
+++ b/src/retailcrm.php
@@ -5,8 +5,8 @@
  * Description: Integration plugin for WooCommerce & Simla.com
  * Author: RetailDriver LLC
  * Author URI: http://retailcrm.pro/
- * Version: 4.4.7
- * Tested up to: 5.9
+ * Version: 4.4.8
+ * Tested up to: 6.0
  * WC requires at least: 5.4
  * WC tested up to: 6.7
  * Text Domain: retailcrm
diff --git a/src/uninstall.php b/src/uninstall.php
index 22594ad..743315e 100644
--- a/src/uninstall.php
+++ b/src/uninstall.php
@@ -16,7 +16,7 @@
  *
  * @link       https://wordpress.org/plugins/woo-retailcrm/
  *
- * @version    4.4.7
+ * @version    4.4.8
  *
  * @package    RetailCRM
  */
diff --git a/tests/test-wc-retailcrm-orders.php b/tests/test-wc-retailcrm-orders.php
index d5d9ab5..04a8bc5 100644
--- a/tests/test-wc-retailcrm-orders.php
+++ b/tests/test-wc-retailcrm-orders.php
@@ -423,7 +423,7 @@ class WC_Retailcrm_Orders_Test extends WC_Retailcrm_Test_Case_Helper
 
     public function test_get_shipping_rates()
     {
-        $rate = getShippingRates();
+        $rate = getShippingRate();
 
         $this->assertEquals(null, $rate);
     }