Family Law Questions? Ask a Family Lawyer Online.
Child support is determined by the state which issued the original order as long as one parent still resides in the state. She can ask for a modification and the court will decide on the basis of your financial declarations. The judge can order a variance based on any issues that you wish to present. One of those would be a difference in the cost of living.
You can respond even if you are out of the country. The judge will decide from the paperwork. You are almost always better off with an attorney, especially where this is going to be out of the ordinary. He can decide how much of the fringe benefits are considered income.