Wikihow has all the info on how to register to vote in Arkansas!
“Registering to vote in Arkansas is simple. However, you do need to meet certain requirements. For instance, you must be a U.S. citizen, an Arkansas resident for at least 30 days, and 18 years old on or before the election. Additionally, you must be discharged or pardoned from all convicted felonies. You can register in Arkansas by mailing in your application. You can also fill out an application in person by visiting an approved institution like your county clerk’s office or your local public library.”