No the Online version does not keep your returns even if you efiled through Turbo Tax .
Do you have the .tax2020 file on your computer from last year? Not the one you downloaded from online.
Could you have transferred from the wrong file? See if you have another .tax2020 file on your computer, probably in Documents.
Here's an idea. Do you still have 2020 installed? Try opening 2020 program and see if you can get your 2020 return to show up in it. Go to FILE - OPEN. Then save it again with a name and place you can find. Go to File - Save As or Duplicate.
