If the parent has already paid part of the tuition for the academic year, the school may refund that partial tuition paid to the parent. If the parent has not paid part of the tuition or if there is still excess tuition aid money for the academic year after a refund to the parent, the school must return that excess money to one or all of the STOs paying tuition aid. The amount of tuition aid paid from all STOs for one student cannot exceed the amount of tuition for that academic year.