I want to know about child support after 18(college)

Child support after 18

In some states (like California) there is no college-level support (it terminates after age 18 and upon graduation from high school but in no event extends beyond age 19). Other states have it and often when they do it's not read off the state's child support guideline but is left to judicial discretion.

It all turns or where you are.

What exactly does your child support agreement say,

In Georiga it is to 20, in other states, it is not required, in some states it goes up to 22.

So you will have to pay exactly what your child support order says

Generally, this is written into the support agreement which has to be approved by a judge.