2020 Wisconsin Tax Return Due Dates and Payments


​​​​​​​​​​​​This guidance document provides information about the effect of Internal Revenue Service (IRS) Notice 2021-21 issued as a result of the ongoing COVID-19 pandemic. See the IRS News Release for more information.

Applicable Laws and Rules

This document provides statements or interpretations of ch. 71, Wis. Stats.​, enacted as of March 30, 2021. Laws 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 Guidance issued prior to this date that is contrary to the information in this document is superseded by this document, pursuant to sec. 73.16(2)(a), Wis.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 5-77
Wisconsin Department of Revenue​
Customer Service Bureau
PO Box 8949
Madison, WI 53708-8949
Phone: (608) 266-2776
Fax: (608) 267-1030
Email: ​ ​ DORBusinessTax@wisconsin.gov

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

Guidance Document Number: 100262

April 20, 2021