Taxpayer Advocate Service | Taxpayer Advocate Service
4041 N Central Ave, Phoenix, AZ 85012-2623
Eligibility
Taxpayers with unresolved problems
Hours
Mon-Fri 8:30am-4:30pm
855-829-5330
Fax·
Toll-Free Fax
602-636-9500
Voice·
Open Cases
877-777-4778
Voice·
Toll-Free Centralized Case Intake
Application process
Call or visit website to download Form 911: Request for Taxpayer Advocate Service Assistance. Return form by fax or mail.
Fees
None
Service area
All ZIP Codes, AZ
Provides assistance to help taxpayers resolve problems with the IRS and recommends changes that will prevent problems.
Last Assured
10/01/2025
What's Here
Providing organization
Taxpayer Advocate Service
Provides assistance to help taxpayers resolve problems with the IRS and recommends changes that will prevent problems.