How do I switch my child support order from Tennessee to Missouri

Why are you attempting to move jurisdiction? The reason matters.

Do either of the parents still reside in the jurisdiction of the original order?

We can help you, but will require a lot more information.
As noted,
What is your relationship to this. ( mother, father, child someone else?)
What state is it in now? Who lived there, do they still live there now ? Who has moved out of state, and who is wanting to move it.
Basically all the details.