Tax Return File is gone

I bought the CD this year and filed taxes for 2019 back in February. Everything was great until I just tried to access my return through the .tax file I saved, and when I opened it up, everything was gone. My entire return is missing; the program is acting like I've never even used it before. How do I recover this? I really need my tax information, but didn't save a PDF because I was told this would work just as well. Apparently not.