GSTR 3B Filed without GSTR 1

Mohanraj J (1162 Points)

18 March 2021  
Dear Friends,

Is it possible to file GSTR 3B without filing of GSTR 1?.

One of my friend was filed Nil transaction in 3B for the period Mar 20 to Dec 20. Jan 21 he has provided some services, but that transactions also he didn't shown in GSTR 1 and shown in 3B only.

is it possible now to file GSTR 1 nil Returns (Without late fee/interest) the period Mar 20 to Dec 20 & transactions done on Jan 21?

Now, he has realised his mistakes. Any expert can give Solutions for this ?