Montana Schedule B is a form used by Montana residents to report income from certain sources, such as gambling winnings, and other non-employment sources of income. It is part of the Montana individual income tax return and must be filed with the Montana Department of Revenue. There are three different types of Montana Schedule B forms: Montana Schedule B-1, Montana Schedule B-2, and Montana Schedule B-3. Montana Schedule B-1 is used to report income from rent, royalties, estates, trusts, partnerships, S corporations, and other sources. Montana Schedule B-2 is used to report income from gambling winnings, awards, prizes, and other non-employment sources of income. Montana Schedule B-3 is used to report income from federal form 1099-MISC and other miscellaneous income sources.