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 .