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Wisconsin Department of Revenue

 Reporting Unfiled Returns or Unpaid Taxes

  1. How do I report someone I suspect is not filing returns or paying taxes?
  1. How do I report someone I suspect is not filing returns or paying taxes?

    If you believe someone is violating Wisconsin tax laws, you may contact the Wisconsin Department of Revenue at:

    Wisconsin Department of Revenue
    P.O. Box 8906
    Madison, WI 53708-8906

    or

    e-mail us

    Please provide as much detailed information as is possible. You must provide the name of the person or business you are reporting. You may include your name or you may remain anonymous. Following is a list of the types of information to provide us if you know it:

    • Current address of the person or business.
    • A detailed description of what you suspect (for example, not filing returns, receiving cash payments).
    • How you became aware of this problem.
    • Social security number of the person.
    • Type of tax not being paid (such as sales tax, income tax, withholding tax).
    • Name of the person's employer.
    • Dates or years involved.

FOR MORE INFORMATION PLEASE CONTACT:

WISCONSIN DEPARTMENT OF REVENUE
Customer Service and Education Bureau
P.O. Box 8949
Madison, WI 53708-8949
Phone: (608) 266-2486
Fax: (608) 267-1030
E-Mail Additional Questions

Last updated December 21, 2007