NO. the deadline for an unextended S-corp (as well as other calendar year returns for C-Corps, Partnerships, and Estate and Trusts) was not changed for Covid. It was 3/16/2020. if you filed an extension on or before 3/16/2020 then you would have had until 9/15/2020 to file. your return is late. ask for abatement or pay the penalty.
most likely the same rules will apply for the 2020 S Corp return
