I'm trying to put a towbar on my wagon and am having trouble removing the bumper. Can someone tell me how to do it plaese?

10 mm bolts at the front tip of the bar, near the rear doors - might need to remove mudflaps.
2 10 mm bolts along either side of the body, these are reached by removing the interior cargo space lower trim, and reach in through the holes.
2 bolts each side, 14 mm (I think) under the carpet along the back edge of the body. (or is that the sedan? It's been a while. lol )

Put the bar aside on something soft, like the lawn, so as to not damage the paint. It's floppy when off.

Have you tried to fit the towbar without removing the bumper? I managed to do it on my TJ sedan.

when i removed the tow bar from my TS wagon all it took was removal of bolts on the towbar itself.
There should be no need to remove the bumper, if you find it necessary it is possible you are doing it wrong.
my thoughts