Do I need a Buisness Liscence to sell at a con?

Yeah, the title says it all. It recently came to my attention that I may need a liscence to sell a convention. Could someone tell me if this is true, and if so what are the laws in Tenessee about this sort of thing?

No you do not. The government is hardly concerned with artists at small conventions selling their art. If you were selling a bigger product like toys and t-shirts, you might have to keep a better track record of what you sell, but generally speaking, I've never kept a record of sales at conventions nor have I had a problem pre-business license selling my art

Okie dokie! Thanks!