diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.py b/erpnext/stock/doctype/delivery_note/delivery_note.py
index 1e4bb0d143f..aa902cda2be 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.py
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.py
@@ -1048,7 +1048,7 @@ def make_sales_invoice(source_name, target_doc=None, args=None):
 			},
 			"Sales Taxes and Charges": {
 				"doctype": "Sales Taxes and Charges",
-				"reset_value": True,
+				"reset_value": not (args and args.get("merge_taxes")),
 				"ignore": args.get("merge_taxes") if args else 0,
 			},
 			"Sales Team": {
diff --git a/erpnext/stock/doctype/purchase_receipt/purchase_receipt.py b/erpnext/stock/doctype/purchase_receipt/purchase_receipt.py
index 6269b1fb860..9d72b0ee53e 100644
--- a/erpnext/stock/doctype/purchase_receipt/purchase_receipt.py
+++ b/erpnext/stock/doctype/purchase_receipt/purchase_receipt.py
@@ -1205,7 +1205,7 @@ def make_purchase_invoice(source_name, target_doc=None, args=None):
 			},
 			"Purchase Taxes and Charges": {
 				"doctype": "Purchase Taxes and Charges",
-				"reset_value": True,
+				"reset_value": not (args and args.get("merge_taxes")),
 				"ignore": args.get("merge_taxes") if args else 0,
 			},
 		},