Well if your car got hit there, the best thing is to take to a body shop because I don't think you can do it yourself. You might need to straighten out the frame of the rear end. I'm not an expert on bodywork, but I use to hang out every other day at my friends shop when my car was hit before. It's very hard to say that they can fix 100 percent. I think they can only straighten as much as possible. My car gotten hit in the front and my align of it is a little off. Two shop spent hours on it and still can't fix the problem so it's better, but still not best look like fresh out of the dealer.