The commissioner shall have the power to require any producer, or person in charge of production operations, or person purchasing any oil from the soil, or water, to furnish any additional information by him deemed to be necessary for the purpose of computing the amount of said tax; and for said purpose to examine the books, records, and all files of such person; and, to that end, the commissioner shall have the power to examine witnesses, and if any such witness shall fail or refuse to appear at the request of the commissioner, or refuse access to books, records and files, said commissioner shall have the power and authority to proceed as provided by the Mississippi Sales Tax Law.