Business Tax Online Registration

Applicable Laws and Rules

This document provides statements or interpretations of ch. 71, Wis. Stats., and ch. Tax 14, Wis. Adm. Code, enacted as of March 3, 2021. Laws or rules enacted and in effect after this date, new administrative rules, and court decisions may change the interpretations in this document. Guidance issued prior to this date that is contrary to the information in this document is superseded by this document, pursuant to sec. 73.16(2)(a), Wis. Stats.

​​​Contact Us

MS 3-80
Tax Operations Bureau
PO Box 8902
Madison, WI 53708-8902
Phone: (608) 266-2776
Fax: (608) 327-0232​
Email additional questions to

The department welcomes your input on our guidance. Submit comments on this guidance document.

Guidance Document Number: 100145

March 3, 2021