To finish or make corrections, if you can no longer make changes to your return, but before you've 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.