Can I file a joint Montana return if my spouse and I have different residency statuses?

If you are Married Filing Joint and you and your spouse have different Montana residency statuses, you can still file together on a Montana return. Montana has a Mixed Residency filing status for this situation. Answer Yes when asked if you and your spouse have different Montana residencies and enter each of your respective residency statuses.

If either of you were a full-year resident of Montana, you'll need to include all income earned by the full-year resident as Montana income when we gather Montana-sourced income information.