Stop Tax Penalties on American Hostages Act of 2025

S 655, the Stop Tax Penalties on American Hostages Act of 2025, prevents U.S. citizens wrongfully detained or held hostage abroad from facing tax penalties during their detention. It postpones tax deadlines and refunds penalties paid for tax years during detention (starting January 2021), directly affecting individuals identified under the Robert Levinson Hostage Recovery Act. Key mechanisms include requiring the State Department and Attorney General to provide Treasury with lists of affected individuals by January 2026, and enabling refunds for penalties paid during detention via a new Treasury program. The law applies to tax years ending before the bill's enactment, with refunds processed like standard overpayment refunds.