Montana deduction 2026

1. Click ‘Get Form’ to open the Montana Deduction worksheet in the editor.
2. Begin with Column A for your filing status. Enter your Montana adjusted gross income from Form 2, line 41 in the first row.
3. In the second row, multiply the amount from line 1 by 20% (0.20) and enter the result.
4. For row three, input your maximum standard deduction based on your filing status: $4,510 for single or separate filers, and $9,020 for joint or head of household.
5. In row four, enter the smaller amount between line 2 and line 3.
6. Continue filling out rows five and six by entering your minimum standard deduction based on your filing status and then determining your final standard deduction.

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