(a)(1) In the case of an individual serving in the armed forces of the United States, or serving in support of such armed forces, in an area designated by the President of the United States by executive order as a “combat zone” at any time during the period designated by the President by executive order as the period of combatant activities in such zone, or hospitalized inside or outside the state as a result of injury received while serving in such an area during such time, the period of service in such area, plus the period of continuous hospitalization inside or outside the state attributable to such injury, and the next one hundred eighty days thereafter, shall be disregarded in determining the timeliness of actions under this chapter with respect to income tax liability, including any interest, penalty or addition to the tax, related to such individual.

(2) The provisions of this subsection shall also apply in the case of an individual serving in the armed forces of the United States, or serving in support of such armed forces, in an area designated by Congress in a public law, and during a period beginning on a date designated by Congress in such public law and ending on a date designated either by the President by executive order or by Congress in a public law, or hospitalized inside or outside the state as a result of injury received while serving in such an area during such time, if such public law provides that, in such area and during such period, such services by such individual are to be treated in the same manner as services as a member of the armed forces of the United States in an area designated by the President of the United States by executive order as a “combat zone” during the period designated by the President by executive order as the period of combatant activities in such zone.

(b) (1) In the case of any person who dies while in active service as a member of the armed forces of the United States, if such death occurred while serving in a combat zone during a period of combatant activities in such zone, as described in subsection (a) of this section, or as a result of wounds, disease or injury incurred while so serving, the tax imposed by this chapter shall not apply with respect to the taxable year in which falls the date of his or her death, or with respect to any prior taxable year ending on or after the first day so served in a combat zone, and no returns shall be required on behalf of such person or his or her estate for such year; and the tax for any such taxable year which is unpaid at the date of death, including interest, additions to tax and penalties, if any, shall not be assessed and, if assessed, the assessment shall be abated and, if collected, shall be refunded to the legal representative of such estate if one has been appointed and has qualified, or, if no legal representative has been appointed or has qualified, to the surviving spouse.

(2) The provisions of this subsection shall also apply in the case of an individual who dies while in active service as a member of the armed forces of the United States, if such death occurred while serving in an area designated by Congress in a public law, and during a period beginning on a date designated by Congress in such public law and ending on a date designated either by the President by executive order or by Congress in a public law, or, as a result of wounds, disease or injury incurred while so serving, if such public law provides that, in such area and during such period, the death of such individual while in active service in such area and during such period, or as a result of wounds, disease, or injury incurred while so serving, are to be treated in the same manner as the death of any individual while in active service as a member of the armed forces of the United States in an area designated by the President of the United States by executive order as a “combat zone” during the period designated by the President by executive order as the period of combatant activities in such zone.

(c) (1) (A) In the case of a specified terrorist victim, the tax imposed by this chapter shall not apply with respect to the taxable year in which falls the date of his or her death, and no returns shall be required on behalf of such individual or his or her estate for such year. The tax for any such taxable year that is unpaid at the date of death, including interest, additions to tax and penalties, if any, shall not be assessed and, if assessed, the assessment shall be abated and, if collected, shall be refunded to the legal representative of such estate.

(B) Subparagraph (A) of subdivision (1) of this subsection shall not apply to the amount of any tax imposed by this chapter that would be computed by only taking into account the items of income, gain or other amounts attributable to (i) deferred compensation that would have been payable after death if the individual had died other than as a specified terrorist victim, or (ii) amounts payable in the taxable year that would not have been payable in such taxable year but for an action taken after September 11, 2001.

(C) This subdivision shall apply to taxable years commencing on or after January 1, 2001, but prior to January 1, 2002.

(2) (A) In the case of a specified terrorist victim who, pursuant to § 12-704, was allowed a credit against the tax otherwise due under this chapter for an income tax imposed on such individual for a taxable year commencing on or after January 1, 2000, but prior to January 1, 2001, by another state of the United States or a political subdivision thereof or the District of Columbia on income which was derived from sources therein and which was also subject to tax under this chapter, and whose tax liability to such other jurisdiction is abated, credited or refunded because such individual died as a specified terrorist victim, the additional tax imposed by this chapter attributable to the difference between the amount of tax of such other jurisdiction that the individual is finally required to pay and the amount of tax of such other jurisdiction used to determine the credit allowed to such individual under § 12-704 shall not apply.

(B) This subdivision shall apply to taxable years commencing on or after January 1, 2000, but prior to January 1, 2001.

(d) If an individual who is entitled to relief under subsection (b) or (c) of this section has filed a joint return under this chapter with his or her spouse for any taxable year with respect to which such individual is entitled to such relief, the tax abated, credited or refunded pursuant to this section for such year shall be an amount equal to that portion of the joint tax liability which is the same percentage of such joint liability as a tax computed upon the separate income of such individual is of the sum of the taxes computed upon the separate incomes of such individual and his or her spouse.