IRS offices in Wisconsin
The IRS operates Taxpayer Assistance Centers (TACs) for in-person tax services. Wisconsin has 6 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 (walk-in for forms only)
- Prior-year returns assistance
⚠️ All TAC visits require an appointment. Call the local office below OR the IRS appointment line at 844-545-5640.
IRS Taxpayer Assistance Centers in Wisconsin
6 IRS TACs listed for Wisconsin. TACs handle in-person tax services including ITIN applications (Form W-7), identity verification, account problems, and tax-return assistance for prior years.
| Office | Address | Phone | Hours |
|---|---|---|---|
| Appleton | 1901B East Capitol Dr., Appleton, WI 54911 | (920) 996-4860 | 8:30am - 4:30pm |
| Eau Claire | 500 S. Barstow St, Eau Claire, WI 54701 | (715) 930-1663 | 8:30am - 4:30pm · (Closed for lunch 12 - 1 p.m.) |
| Green Bay | 440 Security Blvd., Green Bay, WI 54313 | (920) 662-5999 | Reported closed in the IRS locator as captured — call 844-545-5640 before going |
| La Crosse | 425 State Street, La Crosse, WI 54601 | (608) 785-0246 | 8:30am - 4:30pm · (Closed for lunch 12 - 1 p.m.) |
| Madison | 1242 Fourier Dr., Suite 200, Madison, WI 53717 | (608) 421-7898 | 8:30am - 4:30pm · (Closed for lunch 12 - 1 p.m.) |
| Milwaukee | 211 W. Wisconsin Ave., Milwaukee, WI 53203 | (414) 231-2100 | 8:30am - 4:30pm |
How to schedule an IRS TAC appointment in Wisconsin
- 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 2-4 weeks in advance during peak tax season (Jan-Apr)
- 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 Wisconsin — separate volunteer sites for low-income filers
- State income tax obligations in Wisconsin — state filings happen separately from IRS
- USCIS forms library — federal immigration forms
- Find an immigration attorney — for cross-border tax + visa interactions
Last verified: 2026-09-10. Source: the IRS Taxpayer Assistance Center directory (apps.irs.gov), captured 2026-05-27 — every address, phone, hours cell and office note in the table above is that snapshot, 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.