I'm in Indiana and my daughter and I have always lived in Indiana and the child support order is here in Indiana. My ex lives in Tennessee. Our daughter just turned 18 and is in her senior year of high school. Indiana child support ends at 19 and Tennessee at 18. I just received paperwork from the state of Tennessee regarding stopping child support since she turned 18. I am wondering which state would actually have the authority to stop child support? I always thought we were to go by Indiana since the order is in Indiana and they have jurisdiction. Can someone please let me know which state would be the correct state for this situation?