Home / Tax Resources / State And Federal / Efile-Montana-Tax-Return Efile Montana State Tax Returns Start For Free Montana State Tax Filing Information The eSmart Tax online tax return filing solution makes it easy to efile your Montana state tax return using the correct state tax forms. Prepare your full-year resident Montana state tax return alongside your federal tax return for your convenience. The regular deadline to file a Montana state income tax return is April 15. Find additional information about Montana state tax forms, Montana state tax filing instructions, and government information. eSmart Tax supports the following Montana Tax Forms (Click here to download Montana tax forms) Montana Form 2 Individual Income Tax Return Montana Form 2441-M Child and Dependant Care Expense Deduction Montana Form IT Montana Individual Income Tax Payment Voucher Liberty eSpecial: $50 Off Tax Prep! State MT Website and Contacts State Website http://mt.gov/revenue/ Taxpayer Assistance: (866) 859-2254 TTY/TDD: (406) 444-2830 Refund Status (Automated Response): (866) 859-2254 Check Refund Status Online: https://tap.dor.mt.gov/_/#2 Special Processing Type: Availability: State-only tax return: Supported Decedent Return: Supported Return with foreign address: Supported State Return Type Residency: Return Type: Also Attach: Status: Resident Form 2EZ, Form 2M N/A Available State MT Amount Owe Payment Option You have the following options to pay your tax: Mail in a check. You need to attach Payment Voucher (Form IT) Mail check to: Payment Department of Revenue P.O. BOX 6308 Helena MT 59604-6308 State MT Overpayment Option You have the following options: Apply your refund amount to next year's tax payment. Contribute your refund amount to charity. Receive your refund by check through mail. Receive your refund by direct deposit to your bank account.