If you live in one of 18 states and haven’t registered to vote, you’ve already missed your chance to cast a ballot in the midterm elections on Nov. 6.

Other deadlines are fast approaching. Virginia residents, get your postmarks going. Monday is the last day you can register online, in person or by mail.

Monday is also the cutoff for 28 counties in North Carolina that saw extended deadlines after Hurricane Florence.

Tuesday brings deadlines for eight states, plus the District of Columbia:

D.C.: Tuesday is the last day before the midterms to register online or by mail. (Caveat: Mailed forms must be received — not postmarked — by then.) If you can’t log on in time, you can always register in person on Election Day or during early voting, which begins Oct. 22. Just bring proof of residency to your polling place.