If you've missed including purchase and sales invoices in a previous GST return, you can add them to the current period's filing. Specifically, the sales invoice can be included in your April 2021 GSTR-1, and the credit for the missing purchase invoice can be claimed in your April 2021 GSTR-3B, using their original dates.
We are Pvt Ltd. At the time of filing of GST for Mar-2021, We have missed One Purchase and One sale Invoice. But We have accounted the stock for both of them.
My doubt is,
Can we add those missed invoices in Mar-2021 GST Return again?