diff --git a/erpnext/public/js/controllers/taxes_and_totals.js b/erpnext/public/js/controllers/taxes_and_totals.js
index 541fbf1fb8a..c50e6e53928 100644
--- a/erpnext/public/js/controllers/taxes_and_totals.js
+++ b/erpnext/public/js/controllers/taxes_and_totals.js
@@ -64,7 +64,7 @@ erpnext.taxes_and_totals = class TaxesAndTotals extends erpnext.payments {
 			&& this.frm.doc.is_pos
 			&& this.frm.doc.is_return
 		) {
-			this.set_total_amount_to_default_mop();
+			await this.set_total_amount_to_default_mop();
 			this.calculate_paid_amount();
 		}
 
diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index db4783582ec..0f0d68b3d8b 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -870,8 +870,8 @@ erpnext.TransactionController = class TransactionController extends erpnext.taxe
 		frappe.model.set_value(item.doctype, item.name, "stock_qty", valid_serial_nos.length);
 	}
 
-	validate() {
-		this.calculate_taxes_and_totals(false);
+	async validate() {
+		await this.calculate_taxes_and_totals(false);
 	}
 
 	update_stock() {