I am the custodial parent. My divorce agreement provides in two separate provisions, that 1. The Mother and the Father shall each pay one-half of the college expenses...college expenses shall include...room, board tuition, ... 2. In the event the child attends college and lives separate from the Mother, the Father shall receive a one dollar credit against his child support obligation for each one dollar he pays for the room and board expenses, while they reside at college. If total room/board costs are 20,000 and we are each responsible for 10,000, and he owes 45,000 in child support, does he get to deduct 10,000 or 20,000 from child support? And if he deducts 10,000, who is responsible for the other 10,000. Since he deducts 10,000 from my support, doesn't that pay my half?