Tuesday, Sept. 17, is National Voter Registration Day. As we get closer to Election Day in November, local election officials explain all you need to know to get ballot box ready.The holiday has been celebrated since 2012 with the goal of getting people registered to vote. So far, over 5 million Americans have been registered on the day.Kathy Clark is the Senior Deputy Director at the Rockingham County Board of Elections. In her more than 20 years working with the Board of Elections, she says when it comes to the elections process, from registration to the polls, it can be confusing for some.Here are some of the important things you need to know.DeadlinesThe last day to register to vote in person or by mail is Oct. 11. You can register on the Department of Motor Vehicles website or in person at your local board of elections office, library or a …