[-] FO : Fix bug #PSCFV-8917 taxes calculation when changing delivery address

classes/Cart.php

@@ -3415,6 +3415,7 @@ class CartCore extends ObjectModel
 	 */
 	public function setNoMultishipping()
 	{
+		$emptyCache = $result = false;
 		if (Configuration::get('PS_ALLOW_MULTISHIPPING'))
 		{
 			// Upgrading quantities
@@ -3433,7 +3434,9 @@ class CartCore extends ObjectModel
 						AND `id_shop` = '.(int)$this->id_shop.'
 						AND id_product = '.$product['id_product'].'
 						AND id_product_attribute = '.$product['id_product_attribute'];
-					Db::getInstance()->execute($sql);
+				$result = Db::getInstance()->execute($sql);
+				if ($result)
+					$emptyCache = true;
 			}
 
 			// Merging multiple lines
@@ -3451,15 +3454,16 @@ class CartCore extends ObjectModel
 		}
 		
 		// Update delivery address for each product line
-		Db::getInstance()->execute('
-		UPDATE `'._DB_PREFIX_.'cart_product`
+		$sql = 'UPDATE `'._DB_PREFIX_.'cart_product`
 		SET `id_address_delivery` = (
 			SELECT `id_address_delivery` FROM `'._DB_PREFIX_.'cart`
 			WHERE `id_cart` = '.(int)$this->id.' AND `id_shop` = '.(int)$this->id_shop.'
 		)
 		WHERE `id_cart` = '.(int)$this->id.'
-		'.(Configuration::get('PS_ALLOW_MULTISHIPPING') ? ' AND `id_shop` = '.(int)$this->id_shop : ''));
-		
+		'.(Configuration::get('PS_ALLOW_MULTISHIPPING') ? ' AND `id_shop` = '.(int)$this->id_shop : '');
+	
+		$emptyCache = Db::getInstance()->execute($sql);
+
 		if (Customization::isFeatureActive())
 			Db::getInstance()->execute('
 			UPDATE `'._DB_PREFIX_.'customization`
@@ -3468,6 +3472,9 @@ class CartCore extends ObjectModel
 				WHERE `id_cart` = '.(int)$this->id.'
 			)
 			WHERE `id_cart` = '.(int)$this->id);
+
+		if ($emptyCache)	
+			$this->_products = null;
 	}
 
 	/**

classes/tax/TaxRulesTaxManager.php

@@ -80,7 +80,7 @@ class TaxRulesTaxManagerCore implements TaxManagerInterface
 		if (!empty($this->address->postcode))
 			$postcode = $this->address->postcode;
 
-		if (!isset(self::$cache_tax_calculator[$postcode.'-'.$this->type]))
+		if (!isset(self::$cache_tax_calculator[(int)$this->address->id_country.'-'.$postcode.'-'.$this->type]))
 		{
 			$rows = Db::getInstance()->executeS('
 			SELECT *