IRS offices in Colorado
The IRS operates Taxpayer Assistance Centers (TACs) for in-person tax services. Colorado has 4 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 Colorado
4 IRS TACs listed for Colorado. 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 |
|---|---|---|---|
| Colorado Springs | 1365 Garden of the Gods Rd. Suite 280, Colorado Springs, CO 80907 | (719) 551-4923 | 8:30am - 4:30pm |
| Denver | 1999 Broadway, Denver, CO 80202 | (303) 446-1675 | 8:30am - 4:30pm |
| Fort Collins | 301 S. Howes St., Ft. Collins, CO 80521 | (970) 221-0688 | 8:30am - 4:30pm |
| Grand Junction | 400 Rood Ave., Grand Junction, CO 81501 | (970) 241-6265 | none |
How to schedule an IRS TAC appointment in Colorado
- 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 Colorado — separate volunteer sites for low-income filers
- State income tax obligations in Colorado — state filings happen separately from IRS
- USCIS forms library — federal immigration forms
- Find an immigration attorney — for cross-border tax + visa interactions
Last verified: 2026-09-01. 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)
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.