The way to resolve the issue that you have written can be accomplished two ways as follows:1. you and the other parent of your child enter into a stipulation and order to be filed with the court after you each sign it where your child support payments are reduced to a certain amount and you are entitled to a rebate of money paid;2. if the other parent refuses to agree to the suggestion in # 1 above, you will need to file a petition with the court sekeing the relief you want.I suggest that you have a family law attorney assist you in the above and in drafting any documentation.