You need to remove the trunk lining on the side with the taillight. You will see some big plastic retainers, which either pop or screw in.
Once you get that off, there are like 12 bolts holding the brake light to the body. Be careful, they have rubber grommets/washers on them to keep water out of the brakes.
Remove the bolts, then the brake light will pull away. From that you will see three sets of bulbs, just twist them to get them out.
It does take some time to figure out how to remove the trunk lining and finding all the bolts holding the brake light in.
Can't afford Mods? Go To College!