IRS offices in Montana
The IRS operates Taxpayer Assistance Centers (TACs) for in-person tax services. Montana has 7 TACs.
TACs handle:
- ITIN applications (Form W-7) — a TAC with ITIN services reviews your completed Form W-7, authenticates most supporting documents and mails your application package, all for free. A TAC is not a Certifying Acceptance Agent: the IRS lists CAAs as a separate, fee-based option
- Identity verification for tax returns
- Account problems and balance-due payments
- Tax law questions (limited; most are routed to phone or IRS.gov)
- Tax form pickup (no appointment needed)
- Prior-year returns — drop-off by appointment; TACs no longer prepare returns
⚠️ Most TAC services require an appointment — the IRS exceptions are making a non-cash payment, picking up blank forms and dropping off a current-year return. Call the local office below OR the IRS appointment line at 844-545-5640.
IRS Taxpayer Assistance Centers in Montana
7 IRS TACs listed for Montana. TACs handle in-person tax services including ITIN applications (Form W-7) at TACs that offer ITIN document review, identity verification and account problems; they no longer prepare tax returns.
| Office | Address | Phone | Hours |
|---|---|---|---|
| Billings | 2900 4th Ave N. Room 200, Billings, MT 59101 | (406) 247-7446 | 8:30am - 4:30pm |
| Great Falls Virtual Assistance | Great Falls, MT 59401 — street address not published | Not published — call 844-545-5640 | This TAC opens 10:30 am - 12:00 pm Tuesday and Thursday Only. |
| Great Falls | 219 2nd Ave South, 3rd Floor, Great Falls, MT 59405 | (406) 761-8095 | 8:30am - 4:30pm |
| Helena Virtual Assistance | Helena, MT 59601 — street address not published | Not published — call 844-545-5640 | This TAC opens 10:30 am - 4:00 pm Tuesday and Thursday Only. |
| Helena | 10 W. 15th St., Suite 2300, Helena, MT 59626 | (406) 441-1039 | 8:30am - 4:30pm |
| Kalispell | 555 Corporate Drive, Suite 202, Kalispell, MT 59901 | (406) 752-6636 | 8:30am - 4:30pm |
| Missoula | 2681 Palmer St. Suite F, Missoula, MT 59808 | (406) 728-9127 | 8:30am - 4:30pm |
IRS locator notices, checked October 15, 2026. Billings: Lunch Closure: 12:30 pm - 1:30 pm (from 1/1/26 to 12/31/26). Office Closure: All Day 10/20/26. Great Falls: Lunch Closure: 12:30 pm - 1:30 pm (from 1/1/26 to 12/31/26). Office Closure: All Day 10/16/26. Office Closure: 10/19/26, 8:30 am - 11:30 am. Missoula: Lunch Closure: 12:30 pm - 1:30 pm (from 1/1/26 to 12/31/26). Kalispell: Lunch Closure: 12:30 pm - 1:30 pm (from 1/1/26 to 12/31/26). Office Closure: All Day 10/27/26. Re-read October 23, 2026: Kalispell: Office Closure: All Day 10/30/26 - 11/3/26. Office Closure: All Day 11/9/26 - 11/10/26. Office Closure: All Day 11/16/26 - 11/17/26. Call 844-545-5640 before going.
In-person ITIN document review at IRS offices in Montana
The IRS page IRS Taxpayer Assistance Centers providing in-person ITIN document review (marked “Page Last Reviewed or Updated: 24-Aug-2026”; checked October 15, 2026) lists these Montana offices: Great Falls, Kalispell. On that page the IRS says TAC employees “can review your original documents and certified copies from the issuing agencies required to apply and renew for” ITINs, and that “Your documents will be returned to you at the end of your appointment.”
How to schedule an IRS TAC appointment in Montana
- Choose the office most convenient for you above
- Call the office number OR the central appointment line: 844-545-5640
- Explain the reason for your visit (W-7 ITIN, identity verification, etc.)
- Schedule your appointment ahead of time, as the IRS asks
- Confirm what original documents you must bring
Related procedural information
- ITIN — individual taxpayer ID without SSN — the federal procedure your TAC will help with
- Free tax prep (VITA + TCE) in Montana — separate volunteer sites for low-income filers
- State income tax obligations in Montana — state filings happen separately from IRS
- USCIS forms library — federal immigration forms
- Find an immigration attorney — for cross-border tax + visa interactions
Last verified: 2026-09-24. Source: the IRS Taxpayer Assistance Center directory (apps.irs.gov), read 2026-10-15 — every address, phone, hours cell and office note in the table above is from that reading (notes marked re-read October 23, 2026 are from that later reading), not a same-day reading. The page itself was reviewed on the date above. General procedural information — not legal or tax advice. Always call 844-545-5640 to verify office hours and services before traveling.
Recent IRS appointment and ITIN context (2025-2026)
Key lines stay here: TACs are appointment-only at 844-545-5640; the ITIN application itself has no IRS fee; free VITA tax preparation is at 1-800-906-9887. The national context for IRS appointments, ITIN processing times, VITA free tax preparation and the Child Tax Credit rules is maintained once, on the IRS offices by state hub, so it stays current for every state.