I did my taxes but it has not been efiled yet. I enetered the wrong last name on my dependent. How can i fix it?

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

Click on Take me to my return

Or-

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.  Click on My Info on the left side of the online program screen.  Edit the dependent to make changes.