If you're using the online version, it's most likely that you have multiple accounts and have logged in with the wrong one. Use https://myturbotax.intuit.com/account-recovery/ to see if you have multiple online accounts.
If you are using the CD version, then your 2021 tax file will be in the documents\turbotax directory with a filename extension of .tax2021. If the file is not there, then it was either moved or deleted by you, or more likely someone else who was using your computer.
