Fisher v. United States (1976)

Fisher v. United States, 425 U.S. 391 (1976), is a decision of the U.S. Supreme Court which held that the Fifth Amendment's self-incrimination clause does not protect a taxpayer or their attorney from being required to turn over workpapers prepared by the taxpayer's accountant.

Source: Wikipedia — Fisher v. United States (1976) (CC BY-SA 4.0)