Tenn. Code Ann. § 4-51-137

The board, in coordination with the secretary of state, shall establish a mechanism whereby a lottery ticket winner of a drawing-style game may, upon redemption of prize money of one million dollars ($1,000,000) or more, make a charitable contribution of ten percent (10%) of the total prize money, either before taxes or after payment of taxes and fees, to a 501(c)(3) or 501(c)(19) nonprofit organization that is exempt from federal income taxation under Section 501(c)(3) of the Internal Revenue Code ( 26 U.S.C. § 501(c) (3)) or Section 501(c)(19) of the Internal Revenue Code ( 26 U.S.C. § 501(c) (19)), as applicable. The board shall carry out its duties under this section no later than January 1, 2019. This section does not apply to instant or scratch-off games.