Find Montana income tax forms, tax brackets and rates by tax year.
If you still need to file a return for a previous tax year, find the Montana tax forms below. You can complete and sign the forms here on eFile.com before you mail them to the MT Department of Revenue. For Federal or IRS back taxes access the tax forms here.
Below find links to other important Montana income tax return information and other related features (e.g. tax extension, amendment, etc.)
Prepare only a MT State Return without an IRS return. Details
File a 2021 Montana Tax Amendment
Montana Tax Brackets, Rates explained
IRS Tax Brackets, Rates by Tax Year
Here you can find how your Montana based income is taxed at different rates within the given tax brackets. When you prepare your return on eFile.com this is all calculated for you based on your income.
2021 Tax Brackets and Income ranges will be listed here as they become available.
As you can see your income in Montana is taxed at different rates within the given tax brackets. Any income over $18,700 would be taxes at the highest rate of 6.90%.
$0 - $3,100
1% within Bracket
$3,100 - $5,500
2% within Bracket Less $31
$5,500 - $8,400
3% within Bracket Less $86
$8,400 - $11,300
4% within Bracket Less $170
$11,300 - $14,500
5% within Bracket Less $283
$14,500 - $18,700
6% within Bracket Less $428
6.90% within Bracket Less $596
The Montana standard deductions did increase for Tax Year 2020.
Below are forms for prior Tax Years starting with 2020. These back taxes forms can not longer be e-Filed. You can complete the forms with the help of eFile.com free tax calculators. Complete the respective Form(s) below, sign, and mail them to the Montana Department of Revenue. In addition to filing Montana Forms you might also have to file previous IRS Tax Return Forms.