If the .tax2021 tax return data file was moved after you saved it, TurboTax will not find it automatically. You have to click "Find a Tax File" and browse to where the file is.
Check the Recycle Bin. The Search in Windows Explorer does not search the Recycle Bin.
If you have searched your entire hard drive for *.tax2021 and you really do not have the .tax2021 file, your only option is to spend the time to recreate your tax return. When you use the desktop software, the only copy of your tax return is on the computer that you used, and any backup copies that you made. TurboTax does not have a copy of it.
