Individual Income Tax Filing Deadlines

  1. What is the deadline for filing my Wisconsin return?


If you file late, without an extension, you are subject to penalties and interest.

For information on obtaining a Wisconsin extension of time to file, see the Extensions for Paper and Electronically Filed Returns Common Question​.

FOR MORE INFORMATION PLEASE CONTACT:

MS 5-77
WISCONSIN DEPARTMENT OF REVENUE
Customer Service Bureau
PO Box 8949
Madison, WI 53708-8949
Phone: (608) 266-2772
Fax: (608) 267-1030
Email additional questions to DORIncome@wisconsin.gov

January 2, 2019