I am a noncustodial parent, but my child lives with me now. Can I change the child support order?

Child support is almost always modifiable, so yes. If you have a substantial change in circumstances, that is both substantial and was not anticipated at the time of the divorce, then child support can be modified. If at the time of the divorce it was anticipated that one parent would spend most of the time with the child, but low and behold, as time went on, the other parent became the primary parent that they lived with, then that will usually be considered a substantial change in circumstances, which would trigger your ability to rerun the child support guidelines. If, in fact, when you run the child support guidelines with the new facts, one of which of the facts is there are different numbers of overnights that are spent with each parent, and the end result is that child support changes at least 15% or $50 per month, whichever is less, then you are entitled, or I should say the child is entitled, to rerunning the guidelines and having the new amount of child support paid.