When I get to the point that I've lost the weight I need to, what point system do I need to use in order to maintain the weight? I'm using between 18-23 points now and have about 12 pounds left to lose.

From what I remember from being on WW, once you meet your goal, your points range is the one right above the one you're using now (Where you have just a few more points). That may have changed though, so you'll want to check with your leader.