How do I undo an answer about a new vehicle credit? I clicked on it thinking it was asking about vehicle registration when it was really about electric cars.

To delete Energy-Efficient Vehicle information in TurboTax Online:

1. Open TurboTax Online
2. Select Tax Home in the left pane
3. On the  Hi, let's keep working on your taxes! screen, select the dropdown on the right side of the Deductions & Credits box, then select Start, Continue, or Pick up where you left off
4. On the  Your tax breaks page, scroll down and select Edit/Add or Revisit to the right of Energy-Efficient Vehicles
5. On the  Energy-Efficient Vehicle Summary screen, select Delete to the right of the year of the model year listed
6. Select  Yes on the Delete Confirmation screen
7. On the  Energy-Efficient Vehicles screen, select No, I didn't buy a Clean Vehicle, then select Continue

This should take care of your issue.