No, child support is not paid to the child but to the parent raising the child.
No, the child can not. The other parent could before the child was an adult. The money goes to the parent to use for the child and not directly to the child.
extremely unlikely
The child can not stop the child support because the support goes to his parent. The parent paying can get the agreement changed at the courts.
No, the filing period ended at age 18 for the parent, and age 19 for the adult child.
There is, if you think about it, no such thing as an adult child. If you are 26 you are an adult and if for some reason you were not supported by your biological parent as a child, it is a bit late to do anything about it now.
Only if the obligee parent releases the claim or is deceased.
No. What you suggest is not possible.
Yes, unless/until the child is adopted.
no the child is already 18 then they are legally an adult and the parent doesnt need to pay child support
Depends on your state, but odds are that you cannot. Child support is normally for a custodial parent. If you no longer live with that custodial parent, and are 18, you are an adult, not a child. Thus, you are not technically entitled to child support.
No. The purpose of collecting back child support is to financially reimburse the custodial parent for the support he or she provided in the past. It is not intended to provide present or future support. The debt is owed entirely to the mother in this case, since she was the one who provided financial support to the child. There are cases in which an adult can receive the back child support owed to their parent, but these usually involve the death of that parent.