It’s held in place by plastic clips, you also have to remove the plastic cover for the child safety seat anchor points. You’ll see 4 tabs when you pop open the cover. Use a small flat head or pick to release them while applying slight upward pressure. Take your time looking for the plastic clips and release them one by one. I used a long trim removal tool from a set I purchased at Harbor Freight. https://www.harborfreight.com/paneltrim-removal-tool-set-6-pc-63032.html
Or you can just pull up on it and pray none break. It’s been a while, but I’m sure that covers everything. When it comes to trim pieces little pressure should be more than enough to release them. If you find yourself applying too much force and nothing is releasing, look for screws holding the panel in place.