The Supreme Court has long held that the Commerce Clause of the United States Constitution prohibits states from imposing sales- or use-tax collection requirements on vendors that do not have a physical presence within their jurisdictions. That limitation on state power was challenged as an anachronism in the early 1990s, but the Supreme Court affirmed the continued validity of its physical-presence mandate in Quill Corporation v. North Dakota. Since that case, the legitimacy of the physical-presence test has been largely accepted for purposes of state sales and use taxes. However, states\u27 frustrations with that rule have only increased during that time. States\u27 growing frustrations with the physical-presence rule are due in large par...