You have the file ending in .tax2019 you did back in February? Do you have a Windows computer? Which Windows? Also check in the One Drive folder if you have that.
If the main .tax file doesn't work, you might have one that starts with a Tilde sign ~ like "~your name.tax2019". That file is if your computer crashes or your real file gets lost or deleted or corrupt so you can restore it.
Find your Tax file in Windows
https://ttlc.intuit.com/community/tax-data-file/help/find-your-tax-data-file-tax-file-in-windows/00/...
Or another thought I have is even though you bought the CD a lot of people ended up accidentally using the Online version. When you filled out your return was there a blue menu bar across the top or a black menu bar Down the left side?
