Can I change my federal return after paying my TurboTax fees but prior to e-filing?

[DoninGA]

Yes.  You can change anything on your federal tax return before it is filed.

[VolvoGirl]

If you haven't efiled or mailed your return or it rejected you can go back in to finish and change anything you want.  Do not click on Amend!

Click on Add a State to let you back into your return.

From Tax Home (the first screen you see after you sign in), scroll down to Your tax returns & documents. You may have to select Show to open the drop down.

Select 2021, and then select Add a State (you're not actually adding a state, this is just the workaround).