Michigan: register online by Oct. 19 or in person through Election Day. Early voting starts Oct. 24. Absentee postmarks don't count.

Michigan's general election is Nov. 3, and voting is already underway, Votebeat reports in its updated guide for the midterms. Polls will be open from 7 a.m. to 8 p.m. local time, but absentee ballots are already available and can be returned anytime before 8 p.m. on Election Day. The deadline to register online or by mail is Oct. 19. After that, you can still register in person at your clerk's office, as late as Election Day itself. Early in-person voting must run at least nine consecutive days, starting Saturday, Oct. 24, and this is the first year communities may also offer early voting on the Monday before the election. Some cities start sooner: Grand Rapids on Oct. 20 and Ann Arbor on Oct. 21. The deadline to request an absentee ballot is 5 p.m. on Friday, Oct. 30. Your ballot must be received by 8 p.m. on Election Day; postmarks don't count. Voters on the permanent absentee list should already have their ballots, which clerks were to mail no later than Sept. 24. On mail voting, Votebeat notes that President Donald Trump tried to put new restrictions on voting by mail this year, but the U.S. Supreme Court blocked them from taking effect for the midterms. The Michigan Association of Municipal Clerks says it has notices from the Postal Service that its "processes and procedures will remain consistent with previous election cycles." Bring a photo ID if you vote in person; it makes things go fastest. If you don't have one, state law lets you sign an affidavit instead, and lying on it is perjury. Why it matters at home: your polling place may have moved, since a number of communities have consolidated precincts. Look yourself up on the Michigan Voter Information Center, and if you vote absentee, mail it at least a week early or use a drop box.