Commissioner of Internal Revenue v. Zuch

When the IRS conceded the entire deficiency, the underlying tax liability—the core dispute that gave Tax Court jurisdiction—effectively disappeared, raising the question of whether any "effectual relief" remained for the court to grant. Zuch's argument that she retained a live interest in obtaining a judgment with potential preclusive effect tested whether Article III's case-or-controversy requirement is satisfied by an abstract interest in a ruling's collateral consequences, distinct from the resolution of the tax debt itself. The court had to reconcile the traditional mootness principle—that resolution of the plaintiff's injury ends the case—with the possibility that a taxpayer's interest in a formal adjudication, rather than a settlement or concession, constitutes a separate injury. The resolution turned on whether Tax Court's statutory jurisdiction, which depends on a "notice of deficiency" and live dispute over liability, survives once that liability is conceded away.