@smokebetts If you have NOT e-filed you can still make changes. You might need to click Add a State---you do not really have to add a state return but that trick will allow you back in to make changes to the return before you e-file.
If you are using desktop software you can switch to Forms mode to see the forms while you are working on your return. Online TurboTax does not have forms mode. With online you can preview Form 1040 and Schedules 1,2 or 3 while you work, but not any of the other forms.
PREVIEW 1040
You can pay your TT fees before you file and print to review the forms before you file.
@smokebetts If you have NOT e-filed you can still make changes. You might need to click Add a State---you do not really have to add a state return but that trick will allow you back in to make changes to the return before you e-file.
Yes, you can switch. Please see How do I switch from TurboTax Online to TurboTax Desktop?