My parents still owe tuition money for yeshivas that I went to as a Bachur and are slowly paying it back. Should I be the one to pay the tuition since it was for my education? And can Masser money be used?
If the reason your parents still owe the money is because they are hard up financially and don’t have enough money for their own expenses, etc. then it is permitted to pay for the tuition from maaser money, since they would be considered aniyim.