Direct Marketing Ass'n v. Brohl
Direct Marketing Association v. Brohl, 575 U.S. 1 (2015), was a United States Supreme Court case in which the Court held that a lawsuit by the Direct Marketing Association trade group about a Colorado law regarding reporting the state's tax requirements to customers and to the Colorado Department of Revenue is not barred by the Tax Injunction Act.
Source: Wikipedia — Direct Marketing Ass'n v. Brohl (CC BY-SA 4.0)