I wrote this in the helper on the mobile app, which told me to include as many details as possible and then apparently cuts off the message afterwards without telling you there is a character limit. Neat, but contradictory and unhelpful, TT.
Here's the rest of the situation.
Turbotax asks for federal AGI for both state returns, which I supply. For the ID return, it asks for income that has been double taxed (do I put in ALL my income from both states, because it is being taxed by both states, or just the stuff that ID shouldn't be taxing from MT?)
For the MT return, Turbotax doesn't seem to actually do anything. It asks for my federal AGI, then my MT income, then subtracts. But when it comes time to actually claim the income, it doesn't use that difference. It just puts in my full AGI, including ID income. There doesn't seem to be any prorating, subtraction, or even acknowledgement that my taxable income for MT is being adjusted from the AGI for the final calculations, even though TT asks for the income to be separated on the MT state return step. For all real purposes, TT seems to be treating all my income as resident MT income even though it knows I am not a resident, thus making me pay full income tax on all my income to two different states.
Is TT just not showing some math or process?
