First, I recommend using plastic body panel pry tools. Then remove the top section first (just put pry tool under and lift). Then remove both side pieces (using the same tool). The last piece (the biggest piece), is a pain, but just go around the bottom, using the same pry tool. You will need a lot more leverage to undo the clips, but they will come..
There are a few Utube videos on removing this panel. If you do a utube search, look for Installing power lift gate.
Here is the link: https://youtu.be/gv9R3G3NL-8