I failed to show the GST sales of July and August on GSTR 3B and GSTR 1 can i file the sale amount of July and august along with march sales and show in the GSTR 3B and GSTR 1 of March
You will have to go to 'amendment of invoice' option in GSTR-1 and amend the invoice and yes if tax is payable then you will have to pay interest also @ 18%