Legal Requirements for Homeschooling in Wisconsin
Your only obligation to the State of Wisconsin is to file Form PI-1206 to the Department of Public Instruction by October 15 informing them that you are schooling your children at home. Section 118.165(1), Wis. Stats., requires that a program of at least 875 hours of instruction, which includes a sequentially progressive curriculum of fundamental instruction in six subject areas (reading, language arts, mathematics, social studies, science and health), be provided each school year, and they recommend you maintain a record of this instruction. You are not required to file the form for kindergartners.
Fill out the PI-1206 form here: https://apps4.dpi.wi.gov/HomeSchoolParent/