If you've missed reporting an invoice in your GSTR-1 and GSTR-3B for a particular month, you can include it in the subsequent month's return. Importantly, the purchaser will still be able to claim their input tax credit in the original month the invoice was issued.
13 October 2020
Please advice that if we miss out to report the Invoice in the particular month of GSTR-1 & GSTR-3B, then how the same shall be reported??