A bill to amend the Internal Revenue Code of 1954 to extend the duration of certain provisions relating to members of the armed forces of the United States and civilian employees who are missing in action or hospitalized as a result of wounds, disease, or injury incurred in the Vietnam conflict.

Amends the Internal Revenue Code to extend until January 2, 1979, specified tax provisions for veterans wounded in the Vietnam conflict and spouses of persons missing in action in the Vietnam combat zone.

Provides that after such date: (1) persons classified as missing in action in the Vietnam conflict will be considered dead for purposes of computing the terms of surviving spouses; (2) pay earned while hospitalized for wounds received in the Vietnam combat zone will be included in gross income; (3) income tax will be assessed for the taxable years in which veterans die as a result of service in the Vietnam conflict; (4) spouses of persons classified as missing in action may not elect to file joint tax returns; and (5) time requirements concerning filing, paying, claiming, assessing, collecting and commencing actions regarding tax liability will resume running against spouses of persons missing in the Vietnam combat zone.