WARNING: This page is about a different car, the 2016 Hyundai Elantra GT and 2015 Hyundai Elantra GT. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect the negative (-) battery terminal.
Remove the license lamp assembly (A).
Fig 1: Identifying License Lamp Assembly
Courtesy of HYUNDAI MOTOR AMERICA
Replace the bulb (A) after disconnecting the connector.