Did you use the online version last year or the Desktop program? You need the file ending in .tax2021 to transfer into 2022. It doesn't matter if you efiled or mailed the return. It makes the .tax2021 file either way. Do you still have access to the old computer?
Are you on Windows? The data file should be in Documents in a Turbo Tax subfolder. Or Search your computer for all files ending in .tax or .tax2021. And check the Recycle Bin. The PDF file should be saved there too. If you have Windows 10 check the OneDrive. Or to Drop Box. Check your backups. Could it be under a different user on your computer?
If you don't have the main .tax file you might have one that starts with a Tilde sign ~ like "~your name.tax2021". 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/...
