Your driver’s license number may have changed, and you might not even have realized it. That could cause problems if you go to request a mail ballot or submit a petition.

The decision of the IRS and some states to recommend—or, in a few cases, require—the use of driver’s license numbers as form of authentication on electronically filed personal tax returns has made ...

Make sure your vote counts. The DMV began issuing new driver’s license numbers last November as a way to enhance security, but it doesn't automatically update your voter registration.