- What is the deadline for filing my Wisconsin return?
What is the deadline for filing my Wisconsin return?
Your 2018 return must be filed by April 15, 2019, unless you request an extension of time to file.
A paper return is considered filed by the due date if all three of the following conditions are met:
- the return is mailed in a properly addressed envelope with the postage duly prepaid,
- the envelope containing the return is postmarked on or before the due date, and
- the return is received by the Department of Revenue within 5 days of the due date.
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
FOR MORE INFORMATION PLEASE CONTACT:
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