On June 1, 2011, the Institute filed an amicus brief urging the U.S. Supreme Court to overturn a lower court decision allowing Iowa to tax corporations with no physical presence in the State, KFC Corporation v. Iowa Department of Revenue. The core issue in this case is whether the Commerce Clause of the United States Constitution prohibits a State from imposing its corporate income tax on businesses with no connection to the State other than having customers located there.
On April 28, 2009, TEI filed an amicus brief with the U.S. Supreme Court in support of the taxpayer in Capital One Bank v. Commissioner of Revenue. In Capital One, the Massachusetts Supreme Judicial Court held the imposition of the Massachusetts Financial Institution Excise Tax on out-of-state taxpayers having no physical presence within Massachusetts did not violate the Commerce Clause of the United States Constitution. TEI maintains the Massachusetts court erred by concluding the bright-line, physical presence test embraced by the U.S.