Tax in sales order email is displayed after grand total row

Author: Nazar65

app/code/Magento/Tax/Block/Sales/Order/Tax.php

@@ -12,6 +12,8 @@
 use Magento\Sales\Model\Order;
 
 /**
+ *  Tax totals modification block.
+ *
  * @api
  * @since 100.0.2
  */
@@ -84,7 +86,11 @@ public function initTotals()
         $allowTax = $this->_source->getTaxAmount() > 0 || $this->_config->displaySalesZeroTax($store);
         $grandTotal = (double)$this->_source->getGrandTotal();
         if (!$grandTotal || $allowTax && !$this->_config->displaySalesTaxWithGrandTotal($store)) {
-            $this->_addTax();
+            $taxTotal = new \Magento\Framework\DataObject(['code' => 'tax', 'block_name' => $this->getNameInLayout()]);
+            $totals = $this->getParentBlock()->getTotals();
+            if ($totals['grand_total']) {
+                $this->getParentBlock()->addTotalBefore($taxTotal, 'grand_total');
+            }
         }
 
         $this->_initSubtotal();
@@ -118,6 +124,8 @@ public function getStore()
     }
 
     /**
+     * Initialization grand total.
+     *
      * @return $this
      * @SuppressWarnings(PHPMD.CyclomaticComplexity)
      */
@@ -199,6 +207,8 @@ protected function _initSubtotal()
     }
 
     /**
+     * Init shipping.
+     *
      * @return $this
      */
     protected function _initShipping()
@@ -260,13 +270,17 @@ protected function _initShipping()
     }
 
     /**
+     * Init discount.
+     *
      * @return void
      */
     protected function _initDiscount()
     {
     }
 
     /**
+     * Init grand total.
+     *
      * @return $this
      */
     protected function _initGrandTotal()
@@ -311,6 +325,8 @@ protected function _initGrandTotal()
     }
 
     /**
+     * Return order.
+     *
      * @return Order
      */
     public function getOrder()
@@ -319,6 +335,8 @@ public function getOrder()
     }
 
     /**
+     * Return label properties.
+     *
      * @return array
      */
     public function getLabelProperties()
@@ -327,6 +345,8 @@ public function getLabelProperties()
     }
 
     /**
+     * Retuen value properties.
+     *
      * @return array
      */
     public function getValueProperties()