While you are stationed out of state you can keep your Indiana plates, register your vehicle where you are stationed, or renew your Indiana plates by mail or online through myBMV. The BMV can send your renewal notice and new plates to your home of record or to a friend or family member in Indiana to forward on to you.
Renew by mail or online at myBMV, and record with the BMV the Indiana address you are using while you are out of state.
A copy of your Leave and Earnings Statement, a copy of your valid military ID or Common Access Card, and a completed Affidavit of Military Exemption from Excise Tax signed by your commanding officer.