Paternity

Am I required to pay child support if I'm not the biological father?
Just recently had a DNA test found out that the children are not mine there ages is 10 and 7. Am I bound by law to pay child support even doe I sign the birth certificate not knowing they were not mine. I married there mother after they were born, I am filing for a divorce and this was the out come.
Which state has jurisdiction for a DNA test motion in paternity cases?
I have recently found out that I could be the father of an 11 yr. old child. The mother and legal father divorced in the state of Wisconsin and the legal father has since legally moved to the state of New Mexico with the child. Everything dealing with the court was done in the state of Wisconsin. The mother and I are wanting to file a motion for a DNA test, but aren't sure which state would have jurisdiction over it. Which state would we have to file through?
At what age does child support end in New York?
I live in Florida, but my question is regarding New York State Support laws. At what age is it no longer required to pay support for a child? My grandson is 19 and living at home. He does have part time work.
Does a father owe child support if the child is over 18 and not in school?
Does a father have to pay for child support even though the child is over 18 and is not in school?
What age ends a child's visitation rights in North Carolina and Georgia?
My wife has a child from a previous marriage. The father's mother is using the father for visitation rights even though he doesn't pay child support or have any thing to do with my wife's child (doesn't call or come to visit). What is the age that a child is no longer held to visitation rights as given by a judge? Also the father lives in Georgia, but the child lives in NC. Which state's laws apply?