How to change your address for Montana state taxes
To change the address on your Montana taxes, go through the Montana Department of Revenue — the options are below. Do it separately from the IRS, though: updating your Montana address does not change your federal record, so you’ll also need to file Form 8822 with the IRS.
What are your options with the Montana Department of Revenue?
- TransAction Portal (TAP) — send a secure message
- Form ADD-CH (Change of Address), mail or fax
- Signed letter (for name/SSN changes)
Montana Department of Revenue, PO Box 5805, Helena, MT 59601-5805
Official source: Department of Revenue — change of address. For an address-only change, file Form ADD-CH (mail to PO Box 5805, Helena, or fax 406-444-7723), or send a message via the TransAction Portal (TAP). Form ADD-CH is only for Individual Income Tax filers.
Don’t forget the IRS — this is the part we handle
Federal taxes are separate from Montana. The IRS keeps its own address for your notices and refunds, and for individuals the only way to update it is Form 8822 — by mail, with no online option. That’s the errand we take off your plate, nationwide.
Fill the federal Form 8822 online in about a minute, sign on screen, and we mail it to the correct IRS office — Certified, with tracking. (For your Montana change, use the official link above; we don’t file state forms.)
Handle my IRS address changeFree to fill and mail yourself; $14.99 if we mail it certified.
Common questions
How do I change my address for Montana state taxes?
TransAction Portal (TAP) — send a secure message; Form ADD-CH (Change of Address), mail or fax; Signed letter (for name/SSN changes). The Montana Department of Revenue handles it — the official link is above.
Does changing my Montana address update my IRS address too?
No. Montana and the IRS keep separate records. Tell the IRS separately — for individuals that’s Form 8822, by mail.
Do I have to update both Montana and the IRS when I move?
Yes — they don’t share address updates. Update Montana with the agency above, and the IRS with Form 8822 (we can mail that for you).
See also: where to mail Form 8822 from Montana and the full state directory.
Source: Department of Revenue (official page), checked against the live state site. We are not affiliated with the Montana Department of Revenue or the IRS.