Still have to pay support until they are 21?

What State do you live in. Support ends at 18 some places... but extends to 21 others IF they go to college.

We can't answer without additional information. Including what your child support order specified.

And what specificly does your child support agreement say about this? That is the legal document that rules this matter,

Please stop starting multiple threads for the same question. Ask ONE good question, include the pertinent information to allow our volunteers to answer it appropriately, and WAIT for them to do so.