If a distributor neglects or refuses to file any report required by this chapter, the Commissioner shall make an estimate of the tax due, based upon information available to the Commissioner, for the period for which the distributor failed to make the report, and shall assess the tax due from the licensee, adding to the amount thus determined a penalty of 50 percent. The assessment shall bear interest at the rate of one and one-half percent per month from the date the tax payment was due until paid. The Commissioner shall give the licensee notice by mail of the assessment and payment shall be due within 15 days of the date of the mailing of the notice. (Added 1985, No. 207 (Adj. Sess.), § 1.)