OK I think I spoke too soon. As many in this thread have pointed out, the problem is that there's a bug in TurboTax where it will only charge you for **federal** even if you try to file both federal and state, which results in the e-file error in the end.
The proposed solution (delete and re-enter state) does fix the problem, because then TurboTax correctly prompts you to pay for state before you file. However this is never explained in the highlighted answer, resulting a lot of people like me getting confused as to why we have to pay again.
Can you please update the answer to let people know that they are expected to pay again after re-entering state because they were only charged federal? This would save a lot of people (including those at Intuit) tons of time.
