2019 Non-calendar 1 man 5500 SF or EZ?

I have one last off calendar 2019 form year to file for a 1 man plan. In the past we filed SF 1 -man but for 2020 year the form no longer exists.

Can I still use the 5500-SF one man for a non-calendar year plan beginning in 2019 and ending in 2020?

If I can't use the SF, can I electronically file the 2019 Form 5500-EZ or does it need to be filed on paper? That is can only the 2020 Form 5500-EZ now be filed electronically or can the 2019 Form 5500-EZ also be filed electronically.

I'm pretty sure you would use the SF.  It's all about the year beginning, right?  I don't think you'd have the option to file a 2019 EZ electronically if you tried that.

As always, agree with Bird.

FWIW - 2019 5500-SF one man was accepted by EFAST with acknowledgment file in case anyone else runs into this situation. Thanks Bird.