Anonymous wrote:It's 18. But I think if they are still in highschool at 18 you have to wait until they have graduated.
I don't think that's right. It's possible that child support obligations may extend until then because parents usually don't kick their kids out before they graduate, but I do not think you're legally required to keep an 18-year-old high school student in your house. What if the kid stretechs it out for a few years? Never graduates?
OP, there is one precise, fixed answer in your jurisdiction, and if you're seriously ready to throw your child out, call a local family lawyer--well worth the $100-200 to be precise.