How to Access prior year online returns
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/00/27010
If you can't get the side menus to open up to access the prior year..... You need to start entering some basic Personal Info in 2021 for the side menu to open up. Just continue a little ways into 2021.
If you used the Desktop CD/Download program then the only copy is on your computer and not saved or stored online. So you need to make and keep your own backups.
Or request a transcript from the IRS
https://www.irs.gov/individuals/get-transcript
Once you get them printed (or created as a PDF file) Look thru it for a sheet labelled "Electronic Postmark - Certification of Electronic Filing" .
That sheet tells you when you E-filed your "Federal" tax return electronically, and when it was accepted.......assuming you did file electronically and not by mail. Of course, filling out your tax forms is not the same as completing them, and then actually filing them. After e-filing them, you always should return to the software a few days later to make sure they were "Accepted" and not Rejected.