Section 26-21-104 - Seller registration(a) The Department of Finance and Administration shall participate in an online sales and use tax registration system in cooperation with the states that are members of the agreement.(b) The department shall not use a seller's registration with the online sales and use tax registration system as provided in subsection (a) of this section and any subsequent collection of a sales or use tax in determining whether the seller has nexus with the state for any tax at any time.(c) When registering, a seller may select one (1) of the following models:Acts 2005, No. 2163, § 1; 2007, No. 181, § 3; 2011, No. 291, § 3.