2006 Nissan Altima Replacing tail light assembly

I have a break light that I'm trying to replace in my Altima. I have removed the two nuts on the inside of the car that hold the assembly in place but cant seem to get the assembly to release from the car. I think I read there is a seal of some sort that is holding the assembly in place but Im not sure if there is something else that needs to be removed.

The assembly will move slightly but Im worried that if I apply too much force I will break it.

Any help with this would be appreciated.