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MT Department of Revenue to first-time filers: Keep your address current

January 2019 The Montana Department of Revenue has an important message to anyone filing Montana income tax returns for the first time: Keep your mailing address current with the department. Otherwise, your state income tax refund could get delayed. Nearly everyone who worked in Montana in 2019 is required to file a Montana state income … Continue reading MT Department of Revenue to first-time filers: Keep your address current