(2) If the additional taxes described in this section are not paid prior to the date specified in subsection (1) of this section, the additional taxes shall be considered for all purposes of collection and enforcement of payment as having been delinquent on the date the taxes would normally have become delinquent if the additional taxes had been timely extended on the roll, except that any interest shall be computed prospectively from the 16th of the month following the correction of the roll. [2003 c.274 §2]