I've done this three times in the last month, so you know I can practically do it blindfolded by now. LOL
At any rate, to follow-up on what was said...
1.) Unscrew the two pegs which hold the cargo net inside of the trunk.
2.) Once done, look in the upper-left and upper-right of the trunk. You'll notice two sets of "tabs" (or plugs) there--pull all four straight down.
3.) Now that you have six screwposts exposed, gently work the top of the lining down (to clear the posts), then away from the sidewall.
4.) There they are--the two taillights.
5.) On each taillight, you'll notice four (4) nuts. Unscrew all four, on both taillights. Make sure you don't drop any of the nuts or washers.

6.) Next, wiggle--gently--the taillight and pull straight out.
7.) Now you are all set. Either unplug the wiring harness or unscrew the bulb for replacement.
8.) That's it!
NOTE:
DO NOT USE A SOCKET TO TIGHTEN THE SCREWS UP WHEN REPLACING EVERYTHING. Just hand-tighten them. Seriously, otherwise you risk cracking the plastic housing, and that's definitely NOT a good thing.
ETA: 15 minutes for both taillights. Good luck!