It may not be the issue for you, but for some folks, they have backups to a cloud drive (like Windows OneDrive), and after a certain amount of time (user-settable I think), the file gets transferred to the cloud. Maybe it got moved there and just needed to be restored to the proper TurboTax directory on your local drive.
....or something else strange is going on, as this doesn't happen to the vast majority of other desktop users.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
