Mont. Code Ann. § 15-62-207
15-62-207 Deductions for contributions
15-62-207 . Deductions for contributions. An individual who contributes to one or more accounts in a tax year is entitled to reduce the individual's adjusted gross income in accordance with 15-30-2120 . The contribution must be made to an account owned by the contributor, the contributor's spouse, or the contributor's child or stepchild if the contributor's child or stepchild is a Montana resident.