IRS offices in Illinois
The IRS operates Taxpayer Assistance Centers (TACs) for in-person tax services. Illinois has 15 TACs.
TACs handle:
- ITIN applications (Form W-7) — many TACs are designated as Certifying Acceptance Agents
- 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 Illinois
15 IRS TACs listed for Illinois. 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 |
|---|---|---|---|
| Bloomington | 301 South Prospect Road, Bloomington, IL 61704 | (309) 556-5196 | 8:30am - 4:30pm |
| Champaign | 310 W. Church St., Champaign, IL 61820 | (217) 398-5210 | 8:30am - 4:30pm |
| Chicago | 230 S. Dearborn St., Chicago, IL 60604 | (312) 292-2525 | 8:30am - 4:30pm |
| Decatur | 306 W. Eldorado, Decatur, IL 62522 | (217) 619-7459 | 8:30am - 4:30pm |
| Decatur Virtual Assistance | none, Decatur, IL 62523 | none | none |
| Downers Grove | 2001 Butterfield Rd., Downers Grove, IL 60515 | (630) 493-5291 | 8:30am - 4:30pm |
| Fairview Heights | 380 Office Ct., Fairview Heights, IL 62208 | (618) 589-7399 | 8:30am - 4:30pm |
| Galesburg | 2066 Windish Dr., Galesburg, IL 61401 | (309) 315-5075 | 8:30am - 4:30pm |
| Mt. Vernon 2 | none, Mt. Vernon, IL 0none | none | 9:00am - 4:00pm |
| Orland Park | 14479 John Humphrey Drive, Orland Park, IL 60462 | (708) 873-8310 | 8:30am - 4:30pm |
| Peoria | 2415 West Cornerstone Ct., Peoria, IL 61614 | (309) 621-7273 | 8:30am - 4:30pm |
| Quincy | 3701 East Lake Centre Dr., Quincy, IL 62305 | (217) 224-8208 | 8:30am - 4:30pm |
| Rockford | 4920 E State Street, Rockford, IL 61108 | (779) 500-6808 | 8:30am - 4:30pm |
| Schiller Park | 5100 River Road, Schiller Park, IL 60176 | (847) 737-6688 | 8:30am - 4:30pm |
| Springfield | 3101 Constitution Dr., Springfield, IL 62704 | (217) 993-6783 | 8:30am - 4:30pm |
How to schedule an IRS TAC appointment in Illinois
- 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 Illinois — separate volunteer sites for low-income filers
- State income tax obligations in Illinois — state filings happen separately from IRS
- USCIS forms library — federal immigration forms
- Find an immigration attorney — for cross-border tax + visa interactions
Last verified: 2026-05-27. Source: IRS Taxpayer Assistance Center directory. General procedural information — not legal or tax advice. Always verify office hours and services before traveling.
Recent IRS appointment and ITIN context (2025-2026)
IRS Taxpayer Assistance Centers (TACs) operate by appointment only — call 844-545-5640 to schedule. For ITIN W-7 in-person processing, only designated Certifying Acceptance Agent TACs can verify original passport documents (saves you mailing your passport to Austin, TX). The ITIN application fee is $0 (no IRS fee); third-party Acceptance Agent fees range from $50-$300 per applicant when not using a TAC directly.
H.R.1 / OBBBA effective 2026-05-29 did NOT change Form W-7 ITIN procedures, but the IRS publishes ITIN processing time updates monthly. Current processing time: approximately 7 weeks for new W-7 applications mailed to Austin Service Center. Renewals required for ITINs not used on a federal tax return for 3 consecutive years. The 2024 IRS Strategic Operating Plan allocated $80 billion in funding (later reduced) — TAC hours and locations may shift annually based on Congressional appropriations.
For free tax preparation: 11,000+ VITA (Volunteer Income Tax Assistance) sites nationwide serve households earning under approximately $64,000. TCE (Tax Counseling for the Elderly) sites serve taxpayers 60+. Find sites at irs.treasury.gov/freetaxprep or call 1-800-906-9887. VITA volunteers are IRS-certified annually and can prepare Forms 1040, 1040-SR, 1040-NR (limited), Schedule A, B, C (simple), EIC, Child Tax Credit, ACTC, education credits.
IRS Form W-7 and the Form 1040 series interact via Schedule 8812 (Credits for Qualifying Children and Other Dependents) — ITIN-only filers can still claim the $2,000 Child Tax Credit per qualifying child (US citizen or LPR child with SSN required). The Additional Child Tax Credit refundable portion is $1,700 for tax year 2025. Form 1040-NR filers face different rules; consult a TAC or VITA volunteer for nonresident-alien status questions.