Gstr 10 Final return

My Gst registration was cancelled on 5 dec 19 and cancellation order was received on 6 dec 19 ..

But Final return was not filed till date. 9th april 2020 ... and tab for final return was not shown on dashboard...
what we do for that.... is late fees impose or not..

one thing more after cancellation order recieved .... on 6th dec 19 return was filed for the quarter 2 ..
and current time quarter 3 return are showed to be filed ....

please guide ...