B2C others not given in gstr1 dec21 -omission -how to add?

Thank you for you reply sir

Thank you sir for your reply

Me is on monthly basis. On 17th I selected the file return > select the quarter 4 as jan to March. period as january.Then on gstr1 on Amended b2c others and select the mth as december the mth i missed to file.select the pos and enter the taxable value and save. Once we file gstr1 of January in the coming mth of feb this will automatically update in Dec b2c others I think. While we have to file gstr3b of Dec correctly to avoid late fee. Pls note that we cannot change gstr1 in the same mth once filed. We can do only the coming mth.

Regards

Rajesh

Calicut