I've had the same problem, both in filing 2023 and 2024. Accrued market discount on Treasury notes - exclusion from Michigan income. My broker is reporting correctly as well. This year as last, I can't see any way to get TurboTax to handle this correctly, other than the same override that you mentioned (Michigan Schedule 1, Line 10). That is what I did last year. This will again preclude me from e-filing Michigan. I'm always on the lookout for a solution, but it's an old problem and I really don't expect TurboTax to ever address it.
