Every such association transacting business in this state shall annually on or before March first file in the department a statement, subscribed and sworn to by its president and secretary, or in their absence, by two of its principal officers, showing its financial condition at the close of business on December thirty-first of the year last preceding, and its business for that year, which statement shall be in such form and contain such matters as the commissioner shall prescribe. The commissioner may also address inquiries to any such association or its officers in relation to its condition or affairs, or any matter connected with its transactions, and the officers of such association shall promptly reply in writing to all such inquiries. For good cause shown the commissioner may extend the time within which any such statement may be filed.