Removing the bottom of the back seat?

Yes, there are clips on the front of the seat on each side, and a hook in the center back of the seat. Grab the front edge of the seat and pull up sharply. Push down in the center back to unhook the hook and you can remove the seat.

 

Since "front edge" covers a lot of area along the front of the rear
seat cushion, this might help: one clip is near where a drivers-side
passenger's left knee would be, and the other near where a
passenger-side passenger [that makes sense, right?] would have its
right knee. Just about at the junction of the flat part and the
"bump" at either end of the seat. Hook your fingers firmly under
the front of the cushion and you can probably feel where the pivot
points are -- then just get a good hold right there and jerk upward.
It feels like you're going to break something, but you won't. Do
that on both sides [you'll probably want to walk around to the other
side to release it] and then tilt the front of the cushion upward,
and note carefully at the back in the crack how a little steel loop
hooks under a metal finger back there that's off-center, not even
in the middle. You want that to go back under when you reinstall.
.
_H*

 

Also, fasten all the seat belts before you reinstall the seat bottom. Loop the centre belt over the rear seatback. Then work them back into their respective groves in the seat bottom once it is installed. Otherwise you will be fishing for them.