I think I've found the problem. TurboTax isn't using the detailed information from the downloaded 1099-INT, only the percentages. It's saying, California is 75% of the Bonds, so it gets 75% of the TE Bond Premium. But that's NOT the case, when I looked at the details, California has 84% of the TE Bond Premium. It was giving me a higher number for CA Tax Exempt Interest than it should be.
I was wary this year because we recently received a demand notice (bill with tax due + interest penalty) for our 2019 taxes that we incorrectly reported CA TE Bond Income. When I looked back, everything was entered in TT correctly, with the correct states identifying the Bond Income.
