How do you reach the bulb on a 2004 Hyundai Tiburon to change the passenger taillight?

Remove the luggage trim side cover (in the cargo/ trunk area). There should just be a few screws. You will see the back of the taillight and the wiring harness going into the back of the bulb socket. The socket must be twisted (I believe counter-clockwise) to get it out. Then you just have to push down and twist the bulb out.