Index: /lib/wpsg_calculation.class.php
===================================================================
--- /lib/wpsg_calculation.class.php	(revision 8438)
+++ /lib/wpsg_calculation.class.php	(revision 8439)
@@ -503,5 +503,5 @@
 
                 foreach ($this->arCalculationRow as $k_cr => $cr) {
-   
+					
                 	if ($cr['type'] === 'coupon') continue;
                 	  
@@ -1852,8 +1852,8 @@
 				
 				$arTaxKey = explode('_', $tax_key);
-								
+				
 				$this->arCalculation['tax'][$tax_key] = [
 					'key' => $tax_key,
-					'tax_value' => (($tax_key !== '0' && isset($this->arCountry[$arTaxKey[1]][$tax_key]))?$this->arCountry[$arTaxKey[1]][$tax_key]:0),
+					'tax_value' => ((intval($tax_key) !== 0 && isset($this->arCountry[$arTaxKey[1]][$tax_key]))?$this->arCountry[$arTaxKey[1]][$tax_key]:0),
 					'netto' => 0,
 					'brutto' => 0