How can I make changes to my return which TurboTax shows as printed and filed even though I have not mailed it yet? I don't see an option to do this.

To access your current or prior year online tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/

When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state. 

This will take you back to the 2023 online tax return where you can make any changes needed before filing.