(c) Returns with respect to reporting payments of wages in the form of group-term life insurance provided in a calendar year after December 31, 1963. In the case of each failure to file a return required by
section 6052(a), relating to reporting payment of wages in the form of group-term life insurance provided for any employee on his life in a calendar year after December 31, 1963, and the regulations under such section, within the time prescribed for filing such return (determined with regard to any extension of time for filing), there shall be paid by the person failing to so file such return $10 for each such return not so filed. However, the total amount imposed on the delinquent person for all such failures under
section 6652(a) and this section during any calendar year shall not exceed $25,000.