Did you work in one of those states and have income from the other? If so, which of the two states is your main, primary home - your domicile in tax terminology? If you have to pay taxes in two states, then in TurboTax you must complete your non-resident state return before you do your home state return in order for both returns to be correct.
Or did you literally move from one state to the other during the tax year? If so, which is your "new" state of residence?
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
