3B filed on time but GSTR1 filed after annual cutoff

Prakhar (BUSINESSMAN) (149 Points)

11 February 2021  

One of my suppliers has been filing GSTR3B monthly on time regularly but filed his GSTR1 from March 2019-20 in November 2020 .I have also availed ITC for the same .

Now when I am trying to file annual return (GSTR9) for 2019-20 ,i am not able to avail ITC as supplier filed GSTR1 after annual cut off .Do I have to reverse the ITC along with fine ? What other options do I have as supplier is saying he has paid the tax in GSTR3B .