5 U.S.C. § 5568 - U.S. Code - Unannotated Title 5. Government Organization and Employees § 5568. Income tax deferment

Notwithstanding other statutes, any Federal income tax return of, or the payment of any Federal income tax by, an employee who, at the time the return or payment would otherwise become due, is in a missing status does not become due until the earlier of the following dates:

That due date is prescribed subject to the power of the Secretary of the Treasury or his delegate to extend the time for filing the return or paying the tax, as in other cases, and to assess and collect the tax as provided by sections 6851, 6861, and 6871 of title 26 in cases in which the assessment or collection is jeopardized and in cases of bankruptcy or receivership.