Were you using desktop TurboTax installed on your computer? Underneath your question above it says "Online TurboTax" (web browser version.) Desktop TurboTax does not use a browser to prepare the return.
If you used File > Save on a desktop return it should save to the Documents\TurboTax folder of your computer and should also appear as an icon shortcut on the main screen of the TurboTax program when you re-launch it.
Did you prepare and save the return in desktop TurboTax, but are now looking for it in Online TurboTax by mistake?