I assume you are on Windows? On the Windows Desktop program you have to manually save. It doesn't automatically save although it should ask if you want to save when you start a new return or exit the program.
If you closed without saving see if it will find your return. Go up to File-Open.
You need the file ending in .tax2020 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.tax2020". That file is if your computer crashes or your real file gets lost or deleted or corrupt so you can restore it. The .tax and pdf files should be in your Documents in a Turbo Tax folder. Or search your whole computer and Recycle Bin for all files ending in .tax or .tax2020.
Be sure to save frequently, go up to File-Save or Save As. Save each return with a name you can tell apart from another one. Especially if another return has the same name or initial. Like a father and son. Or if you have the same name the second return might overwrite the first one.
