(l) If upon information which has come into its possession, the prescribed authority is satisfied that any person, who has been liable to pay tax under this Act in respect of any period or periods, has failed to get himself enrolled and pay the tax payable by him in respect of such period or periods, the prescribed authority shall, in the prescribed manner, determine to the best of its judgment the amount of tax for such period or periods, and in making such determination, the prescribed authority shall give such person a reasonable opportunity of being heard.

(2) The amount of tax determined under sub-section (1) that may be directed to be paid by such person, shall be paid by such person in the prescribed manner by such date as may be specified in a notice issued by the prescribed authority in this behalf, and the date to be specified shall not be less than fifteen days from the date of service of the said notice.