When I checked my return it showed this error message, but I cannot find the location where this information is entered on my form.
Your state sch B part 2 has an invalid code and you claim that you don't have a Sch B for your state. Let's try some troubleshooting.
1. Go through your state return and see if you have a zero entered somewhere and make it a blank.
2. Delete the Sch B. If you are using:
Online: see How do I view and delete forms in TTO?
Desktop: If you are working in the cd/download TurboTax program:
3. If you still have a problem, log out of your return and try one or more of the following:
Log back into your return.