With respect to each taxpayer, the tax imposed by this act shall be due and payable annually hereafter, in the manner provided in this section:
Subject to regulations under this act, reasonable extensions of time for good cause shown, may be granted for not more than 6 months unless exceptional circumstances justify a longer period, within which returns may be filed.
In addition, persons in active service with the Armed Forces of the United States, who may be prevented by distance or injury or hospitalization arising out of such service, may be allowed such extension of time for the filing of returns, without interest or penalty, as may be fixed by regulations under this act.
N.J.S. § 54:8A-18