diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index 206340b..801e688 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -572,7 +572,8 @@
 
 	def validate_pos(self):
 		if self.is_return:
-			if flt(self.paid_amount) + flt(self.write_off_amount) - flt(self.grand_total) > \
+			invoice_total = self.rounded_total or self.grand_total
+			if flt(self.paid_amount) + flt(self.write_off_amount) - flt(invoice_total) > \
 				1.0/(10.0**(self.precision("grand_total") + 1.0)):
 					frappe.throw(_("Paid amount + Write Off Amount can not be greater than Grand Total"))