Can I go back on Turbo Tax and add some income changes when I haven’t paid/filed yet? I don’t want to start all over again. Thanks Thanks

Yes.  Click on Add a State to let you back into your return. 

Yes, you can log back in your return and make changes. Don't select add a state because that only appears if you have already filed you return and it's been accepted by the IRS, which isn't true in your case.