No but you need to prove it with proof like DNA test.
You are not legally required to support a child that isn't yours, but you would have to get the court that ordered the paternity payment to reverse its decision, you can't just do it for them.
You can stop child support payments on the grounds that the child is not your biological child only if you did not know that when you agreed to the support, and if a Court approves your request to stop.
Maybe not, if the court rules that you aren't the father.
Sorry buddy! in other words no... tough luck
Get a printout from child support enforcement and find out. see link blow
Depends on the state. In 20 states you are obligated to still pay child support. In most of the other 30, you had just 24 months to learn you are not the father in order to file a challenge to an order. see links below
If the child is an adult, no. If someone else has paid in your place he can sue you for the money. Otherwise, yes.
You still owe the money. It is best to find a survival level job to support your child while you look for the job you want.
techinally yes he ows back child support to the state for the bills the state covered for that single mom.
If you mean "turned it in," you keep pushing the child support office until they give you some definite answers. Keep in mind that the answer might be, "we can't find him," "he's in jail/prison," "he doesn't have any money" or, "he's dead."
If that is the provision of the laws in your state, and/or is provided for in the child support orders. However, the order can be modified so that the money goes directly to the child, as well as having the other parent ordered to pay their portion. see link below for more info on this and which states require it.
Contact state dept. see link