Your 2019 return must be filed by April 15, 2020, 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:
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
MS 5-77WISCONSIN DEPARTMENT OF REVENUE Customer Service Bureau PO Box 8949 Madison, WI 53708-8949 Phone: (608) 266-2486 Fax: (608) 267-1030 Email additional questions to
November 12, 2019