Thank you for your reply, but the .tax2020 file is nowhere to be found. I opened the 2020 version but it also could not find the .tax2020 file. I am the only user of the PC (I also confirmed by checking for the file in Users/Default, Users/Public as well as my own username). I do not use OneDrive, but I checked it anyhow and found no files. I did backup the pdf of the 2020 return but that is of little help for reviewing last year's tax calculations and worksheets. Any other ideas?
