No you don't have to retake NCLEX to move from state to state. Some states are in a compact agreement. If you live and are liscensed in a state that's in the compact you can work on that liscense in other compact states. Some states are walk through where you can go to that board and get approved right away. Others you need to register and pay that state board money and you can get the liscense some take not long at all others take months.