I too am having problems finding the 8915-E you speak of.    When I try to find the form in my software, I'm presented with 8915-A through D  (2016 through 2019).   

My software is fully updated as of this date (4/3/21) 

Wondering if anyone else has not gotten this form.  It appears some have and some haven't, as evidenced by this lively discussion.

Any thoughts would be appreciated.