I have not yet e-filed my 2019 taxes but I was almost done w them on Turbo Tax when I realized I need to change my dependent info on my federal return. On Turbo Tax how do I get bk to where I can chan

Click on My Info on the left side.  If you can't get back into your return Click on Add a State to let you back into your retun. 

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 when accessing the 2019 tax return.  Edit the dependent information.