In most states a child is automatically emancipated on their 18th birthday, in some states however they are not emancipated until age 19 or they graduate high school, whichever comes first. In order to take back legal control of your sons life you would have to have a court declare him unfit or uncapable of caring for his own basic needs due to physical or mental illness. However, you can apply to the court to have your ex pay "secondary" child support as long as your son remains a full time college student, most states allow this up to age 21 or 24 depending on the state.


