For those affected by severe flooding, you may be eligible for Property Tax Relief. Click here to learn more.

Income Tax

<p>Information on filing and paying income taxes in Montana.</p>


Quick Information Due Dates ReturnsMarch 15 ExtensionsSeptember 15 Fees Composite Income Tax Pass-through Entity Withholding Related Resources Nexus Questionnaire (Form NEXUS) A pass-through entity has "nexus" if it has enough ... Nexus
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