For TurboTax Deluxe Download this is not intuitive. However, there is a link labeled "Find a Tax File" below and just to the right of where you click to "Continue Your Return". If you click on this it will search for a .Tax2021 file - Use the dropdown to change to "All Files" and browse to your .Tax2020 file (usually in your TurboTax directory) Click on this file and allow TurboTax to transfer your prior year information when you open your return. It also clears/resets any data you have entered - ALL DATA will need to be re-entered. Note, for 2020 the file may be in a folder called "New Folder". I found this incidentally - hope it helps
