If you are a resident, nonresident, or part-year resident, you have to file a Montana individual income tax return when you have Montana source income and your federal gross income, excluding unemployment compensation, is equal to or greater than the corresponding amounts that are identified in the chart below.
IF your filing status is
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AND at the end of the year you were
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THEN you should file a tax return if your federal gross income, excluding unemployment compensation was at least
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Single, or married filing separately
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Under 65
65 or older
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$4,370
$6,700
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Head of household
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Under 65
65 or older
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$4,370
$6,700
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Married filing jointly with your spouse
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Both under 65
One spouse 65 or older
Both spouses 65 or older
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$8,740
$11,070
$13,400
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