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 2019 online tax return.

how can i correct a printed but unfiled return

The link provided below is "How to cancel or undo an amended return." Even though you are not amending your return, the system may think the return must be in an amended state now. You will just follow the steps within the link, print out the updated version and mail it off:

How do I cancel or undo an amended return in TurboTax Online?