Brake light replacement - HELP

My right rear brake light is dead, and it seems like I need to replace the light bulb in it. Does anyone know how to open to get into the bulb? I don't know where the mechanism or screws are. Thanks.
Car novice

look uP autozone the part store in search enter your car and you can look in the book on your car for free

Which model/year Elantra? Most of them have panels inside the trunk that you just open and replace the bulb from the back.