18. Notice of demand:

(1) If the tax assessed is less than the total amount of tax deposited by the dealer, the amount in excess shall be refunded to the dealer by the Assessing Authority in accordance with the provisions of the Act and these rules.

(2) If the tax assessed is in excess of the total amount of tax deposited by the dealer, the difference shall be realized from the dealer and the assessing authority shall serve on the dealer a notice of demand in Form V, together with a copy of assessment order free of charge:

Provided that the notice of demand for payment of penalty shall be served on the dealer in Form V(A).

(3) The dealer shall deposit the tax assessed in excess of tax deposited by him for the tax period or , as the case may be, assessment year, within a period of thirty days after the date of service of the assessment order and demand notice.