Need to go back and make a change to Oregon state taxes and I haven't paid or finished yet.

Since you have not yet submitted your taxes, you should be able to go back and edit your state return.

To do this, click on State on the left side menu once you are signed into your return. 

Then at the top, click on Your State Returns.  

You should be able to click on the Edit button.

If the Edit buttondoes not work  try refreshing the page or log out and then log back in.

You can also try the following:

 Before you have e-filed or mailed your return, you can "add a state" to make changes:

1.    Sign In to TurboTax Online

2.    Click "My TurboTax" menu

3.    Press "Visit My Tax Timeline" 

4.    Under the "SOME THINGS YOU CAN DO" heading, choose "Add a state" (you're not really adding a state. This allows you to get back into your return). 

5.    Complete/correct as needed.