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State tax filing
Yes. If you are a Montana resident, Montana will tax all of your income regardless of where you earned it. However, Montana will give you a credit for the amount of tax you must pay to the other state for income earned there. (If the other state is ND, there is a reciprocal agreement between MT and ND, and you are only taxed in the state where you live. You wouldn't have to file a ND return unless ND tax is mistakenly withheld).
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March 1, 2026
6:42 AM