Section 35D(1) in The Assam Agricultural Income-Tax Act, 1939
(1)Where an assessee does no pay the amount of tax demanded from him after an assessment made under any provision of this Act within the date specified in the notice of demand served on him in this behalf, he shall be liable to pay simple interest from the 1st day of the month following the said date up to the date of full payment at the rate of two per centum for each English Calendar month on the amount of tax as finally assessed reduced by the amount of tax paid on or before the said first day until the tax is fully paid.