445 U.S. 253 (1980)
Klein v. United States is a landmark case in tax law that addressed the intricacies of the Federal estate tax statute and its application to inheritance.
The primary legal question was whether the IRS's method of valuation for estate tax purposes was consistent with the statutory requirements and fair market value principles stipulated by the Federal estate tax laws.
Under Federal estate tax statutes, the fair market value of all property included in a decedent's gross estate must be determined as of the date of the decedent's death, or as of the alternate valuation date if elected.
The Supreme Court held that the IRS's method of valuation was inconsistent with the fair market value standard required by Federal estate tax statutes. The valuation should reflect what a willing buyer and a willing seller would agree upon, neither being under any compulsion to buy or sell and both having reasonable knowledge of relevant facts.
This case is significant because it underscores the principle that tax determinations must adhere strictly to statutory definitions and fair standards. It emphasized transparency and fairness in valuation procedures, shaping how estate valuations are conducted. Law students study Klein v. United States to understand the practical application of the fair market value principle and to gain insight into the legal frameworks that govern estate taxation, which remain pertinent in contemporary tax law discussions.