When does child support stop for a child

My ex is telling me I will have to pay for her child support for my daughter to go to college when she graduates in May. Is that possible? She turned 18 last December.

Confused

Child support ends at age 18, unless the child is still in high school and making progress towards graduation, however if you have agreed to pay support for a longer period you may be bound to do so. If not, support will end in May.