TurboTax is for Income tax at the federal and state level. Not for sales/use tax, as that's a completely different beast that lives in it's own cave. Sales/use tax is a tax imposed on the products/services you sell, and has nothing really, to do with the profit you make. So you'll deal with any sales/use tax outside of and separately from TurboTax.
A starting point for information on collecting, paying and reporting the sales/use tax in TN can be found at https://www.tn.gov/revenue/taxes/sales-and-use-tax.html.
