diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js
index c3a9855..39a6235 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js
@@ -569,6 +569,10 @@
 		erpnext.queries.setup_queries(frm, "Warehouse", function() {
 			return erpnext.queries.warehouse(frm.doc);
 		});
+
+		if (frm.is_new()) {
+			frm.clear_table("tax_withheld_vouchers");
+		}
 	},
 
 	is_subcontracted: function(frm) {
diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
index 3d74b8f..882a374 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
@@ -71,6 +71,9 @@
 		supplier_tds = frappe.db.get_value("Supplier", self.supplier, "tax_withholding_category")
 		self.set_onload("supplier_tds", supplier_tds)
 
+		if self.is_new():
+			self.set("tax_withheld_vouchers", [])
+
 	def before_save(self):
 		if not self.on_hold:
 			self.release_date = ""
@@ -1415,7 +1418,7 @@
 			"Stock Ledger Entry",
 			"Repost Item Valuation",
 			"Payment Ledger Entry",
-			"Purchase Invoice",
+			"Tax Withheld Vouchers",
 		)
 		self.update_advance_tax_references(cancel=1)
 
diff --git a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
index 1ba7824..cb0d1a7 100644
--- a/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py
@@ -965,7 +965,8 @@
 		pos_return.insert()
 		pos_return.submit()
 
-		self.assertEqual(pos_return.get("payments")[0].amount, -1000)
+		self.assertEqual(pos_return.get("payments")[0].amount, -500)
+		self.assertEqual(pos_return.get("payments")[1].amount, -500)
 
 	def test_pos_change_amount(self):
 		make_pos_profile(
diff --git a/erpnext/controllers/taxes_and_totals.py b/erpnext/controllers/taxes_and_totals.py
index cbcccce..b5836c9 100644
--- a/erpnext/controllers/taxes_and_totals.py
+++ b/erpnext/controllers/taxes_and_totals.py
@@ -889,24 +889,33 @@
 		self.doc.other_charges_calculation = get_itemised_tax_breakup_html(self.doc)
 
 	def set_total_amount_to_default_mop(self, total_amount_to_pay):
-		default_mode_of_payment = frappe.db.get_value(
-			"POS Payment Method",
-			{"parent": self.doc.pos_profile, "default": 1},
-			["mode_of_payment"],
-			as_dict=1,
-		)
-
-		if default_mode_of_payment:
-			self.doc.payments = []
-			self.doc.append(
-				"payments",
-				{
-					"mode_of_payment": default_mode_of_payment.mode_of_payment,
-					"amount": total_amount_to_pay,
-					"default": 1,
-				},
+		total_paid_amount = 0
+		for payment in self.doc.get("payments"):
+			total_paid_amount += (
+				payment.amount if self.doc.party_account_currency == self.doc.currency else payment.base_amount
 			)
 
+		pending_amount = total_amount_to_pay - total_paid_amount
+
+		if pending_amount > 0:
+			default_mode_of_payment = frappe.db.get_value(
+				"POS Payment Method",
+				{"parent": self.doc.pos_profile, "default": 1},
+				["mode_of_payment"],
+				as_dict=1,
+			)
+
+			if default_mode_of_payment:
+				self.doc.payments = []
+				self.doc.append(
+					"payments",
+					{
+						"mode_of_payment": default_mode_of_payment.mode_of_payment,
+						"amount": pending_amount,
+						"default": 1,
+					},
+				)
+
 
 def get_itemised_tax_breakup_html(doc):
 	if not doc.taxes:
diff --git a/erpnext/stock/doctype/material_request/test_material_request.py b/erpnext/stock/doctype/material_request/test_material_request.py
index 78af153..f02462c 100644
--- a/erpnext/stock/doctype/material_request/test_material_request.py
+++ b/erpnext/stock/doctype/material_request/test_material_request.py
@@ -590,6 +590,7 @@
 		mr = frappe.copy_doc(test_records[0])
 		mr.material_request_type = "Material Issue"
 		mr.submit()
+		frappe.db.value_cache = {}
 
 		# testing bin value after material request is submitted
 		self.assertEqual(_get_requested_qty(), existing_requested_qty - 54.0)