Birchwood Town Clerk Washburn County WI recently issued the following announcement
Event: Deadline to register to vote in the General Election
When: October 14, 2020
Deadline for electors to register by mail (postmarked no later than the 3rd Wednesday before the election) or online (closes at 11:59 p.m.) to vote in the General Election.
After this date, electors must register in person in the clerk’s office (deadline is October 30, 2020 at 5:00 p.m.) or at the polling place on Election Day.
Original source can be found here