A couple months ago? In 2020? If you bought the 2018 program did you download and install it on your computer? The 2018 tax return can only be done in the Desktop program and is only saved on your computer.
Your 2018 return ends in .tax2018. Try opening 2018 program and see if you can get your 2018 return to show up in it. Go to FILE - OPEN. Are you on Windows or Mac?
