Update Your Montana Individual Income Tax Account Information

We will update your taxpayer account information when you file your return, however, if you have already filed your return or need to update your account information at another time during the year, you may do so using the process below.

Change of Address Only

If you've already filed a Montana individual income tax return and just need to update your mailing address, submit the:

Note: This form is only for Individual Income Tax filers. To update a business address, use the TransAction Portal (TAP).

Update Additional Account Information

If you need to change your name, address, or social security number, you can send a signed letter that includes:

  • Your old information
  • Your new information
  • The effective date of the change
  • Proof of identity and address, such as:
    • A copy of a valid photo ID (driver’s license or state ID)
    • A recent utility bill or official mail with your current address

Note: If you file a joint return, you will need to provide proof of identity for both spouses.

How to Send Updates

If you need to change your name, address, or social security number, you can send a signed letter that includes:

Mail

Montana Department of Revenue
PO Box 5805
Helena, MT 59601-5805

Fax

(406) 444-7723
Attn: Registration

TAP Message

Log in and send a message through your TransAction Portal account .