You are correct, Tennessee taxes only dividend and interest income. If you do not have this type of income you are not required to file a state return.

As long as you have not paid for the state return, you can remove it. See below link.

https://ttlc.intuit.com/replies/3301384

If you already paid for the state return, see link below.

https://ttlc.intuit.com/questions/1899263