Utah Code Ann. § 59-12-212
(1) The location of the sale of tangible personal property or a product transferred electronically is the location where the seller receives the order if:
(2)
(a) Subject to Subsections (2)(b) through (d), for purposes of this section, the location where a seller receives an order is:
(b) A physical location of a seller or third party includes the following if operated by or on behalf of the seller:
(c) The location where a seller receives an order does not include the location:
(3)
(a) A purchaser is not liable for a tax, penalty, or interest on a sale for which the purchaser remits a tax under this chapter to the seller in the amount the seller invoices if the amount is calculated at the total tax rate applicable to the location where:
(c) If a purchaser does not have a written representation by the seller as to the location where the seller receives the order for the sale, the purchaser may determine the total tax rate applicable to the location where the order is received by using a location indicated by a business address for the seller that is available from the business records:
(4) If an item of tangible personal property or an item that is a product transferred electronically is sold with an item that is subject to Section 59-12-211, all of the items are subject to this section if the items are:
(6) Except as provided in Subsection (5), this section does not apply to the lease or rental of: