BrandyJ,
I registered my previous DF250RTB (2010 model) in Florida where I reside in the winter.

You need to check with the TN DMV with a DF VIN number to verify if you can register it in TN.

So far we know that the DF cannot be registered in California, New Jersey, Pennsylvania and Connecticut.
There are probably more states to add to the list but you need to check with TN.