I cant find the article right now, but the IRS computers sent out a bunch of back dated notices automatically, that shouldnt have been sent out.   

This is what happens when the machines are left in charge for a few months!

You didn't specifically say what kind of return and for what year. 1040? 2019?

It was a 2019 1065 return filed 3/27/2020.

3/27 is late.

Unless you sent in the extension on or before 3/15...its late.