Please note there has been an instance where we raised an invoice with GST for a customer in FY 2022-2023. We filed GSTR1 , and paid the GST while filing GSTR3 B for the said month and also filed GSTR 9 for the financial year. Later in 2023-2024 it was realized that the invoice raised to the party was an overseas customer for whom we need not raise GST bill. Is there anyway we can claim for refund in GST Portal?