lower age of child support in puerto rico till 18 or 19 if still in high school

the law of child support should be changed to lower age of child support till 18 years of 19 years if still i high school , this will make the state of Puerto Rico more productive and not force citizen of USA to be force to support a child when this become adult and he has the right to work and produce for own country without being codependent from a parent , the current child support age system in Puerto rico make payee parent a slave of the island of his adult child, even in some case the parent is already in retirement age and can not enjoy his retirement due to this failing law , please review law and make a fair law for usa citizen and