Montana Schedule A is a form for Montana taxpayers to report their state income tax information. It is typically used to report income from wages, salaries, tips, pensions, annuities, interest, dividends, capital gains, business income, rental income, royalties, unemployment compensation, Social Security benefits, and other income. There are three types of Montana Schedule A form: Form 2, Form 3, and Form 4. Form 2 is for residents who are single, married filing jointly, married filing separately, or head of household. Form 3 is for taxpayers who are filing as a non-resident or part-year resident of Montana. Form 4 is for taxpayers who are filing as a trust or estate.