Election Day is not for another 49 days, but voting is already underway in some key states as the presidential campaign hits the home stretch. While voting is underway, it is not too late to register to vote in several states that have already sent out ballots.

Happy National Voter Registration Day, Californians! Tuesday marks the designated day Americans are encouraged to familiarize themselves with the voting process as the upcoming presidential election nears.

State election officials have purged names from the voter rolls. Here’s how to make sure you’re not one of them (and what to do if you are).