Customer Service Telephone Numbers

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Customer Service

  • Call Center Hours:
    7:45 am - 4:30pm, Monday - Friday
  • Individuals: (608) 266‑2486
    • FAX: (608) 267‑1030
  • Businesses: (608) ​266‑2776

Owe a Collection Balance?

  • Back taxes: (608) 266‑7879
  • State agency or local government: (608) 264‑0345

Check On Your Refund

  • Madison: (608) 266‑8100
  • Milwaukee: (414) 227‑4907
  • Toll Free: (866) 947‑7363 (866‑WIS‑RFND)
  • Available 24/7 - updated daily

Free Volunteer Income Tax Assistance (VITA) Sites

  • Call 211 from anywhere in the state to locate a VITA site near you during income tax season

Internal Revenue Service (federal government)

Office Locations

Mailing Addresses

Free Tax Help

Management Contacts