Tenn. Code Ann. § 67-6-524: Registration of dealers

(a) Dealers with a physical presence in this state shall register with the department to collect and remit tax in accordance with this chapter.

(b) Dealers with no physical presence in this state shall register with the department to collect and remit tax in accordance with this chapter if the dealer engages in the regular or systematic solicitation of consumers in this state through any means and made sales that exceeded one hundred thousand dollars ($100,000) to consumers in this state during the previous twelve-month period. Such dealers shall begin to collect and remit the tax by the first day of the third calendar month following the month in which this threshold was met; provided, however, that this subsection (b) does not require a dealer to collect the tax for sales made before October 1, 2020.