If you've discovered that nil-rated HSN summaries were missed in previous GSTR 1 filings (May, June, July), you can include these missing details in your current month's (August 2021) GSTR 1 return. While there isn't a direct amendment option for past HSN codes, you can add them to the current filing.
10 September 2021
We have filed GSTR 1 already for the month of May, June & July after that when we are going to file Aug-2021, GSTR-1 noticed that for the month of May, June & July, we did not entered the nil rated HSN Summary
so, what we do next , for the same plssss... reply the solution as soon as possible Thank You