MC-39864: [Magento Cloud] - Tax Miscalculation

Author: Serhii Balko

app/code/Magento/Sales/Model/Order/Creditmemo/Total/Tax.php

@@ -99,7 +99,7 @@ public function collect(Creditmemo $creditmemo)
             $baseShippingTaxAmount = 0;
             $shippingDiscountTaxCompensationAmount = 0;
             $baseShippingDiscountTaxCompensationAmount = 0;
-            $shippingDelta = ($baseOrderShippingAmount - $baseOrderShippingRefundedAmount);
+            $shippingDelta = $baseOrderShippingAmount - $baseOrderShippingRefundedAmount;
 
             if ($shippingDelta > $creditmemo->getBaseShippingAmount()) {
                 $part = $creditmemo->getShippingAmount() / $orderShippingAmount;