15-30-323. Penalty and interest for deficiency. (1) If the payment required by 15-30-142(6) is not made within 60 days or if the understatement is due to negligence on the part of the taxpayer but without fraud, the penalty imposed in 15-1-216(1)(c) must be added to the amount of the deficiency. Interest on the additional assessment must be computed as provided in 15-1-216. Except as otherwise provided in this subsection, the interest in all cases must be computed from the date the return and tax were originally due as distinguished from the due date as it may have been extended to the date of payment.
     (2) If the time for filing a return is extended, the taxpayer shall pay in addition interest on the tax due, as provided in 15-1-216, from the time when the return was originally required to be filed to the time of payment.

     History: En. Sec. 14, Ch. 181, L. 1933; re-en. Sec. 2295.14, R.C.M. 1935; amd. Sec. 1, Ch. 34, L. 1949; amd. Sec. 8, Ch. 260, L. 1955; amd. Sec. 2, Ch. 227, L. 1957; amd. Sec. 5, Ch. 253, L. 1959; amd. Sec. 1, Ch. 201, L. 1963; amd. Sec. 1, Ch. 347, L. 1969; amd. Sec. 1, Ch. 450, L. 1973; amd. Sec. 171, Ch. 516, L. 1973; amd. Sec. 1, Ch. 159, L. 1977; R.C.M. 1947, 84-4914(part); amd. Sec. 3, Ch. 477, L. 1981; amd. Sec. 13, Ch. 634, L. 1993 (voided by I.R. No. 112, Nov. 8, 1994); amd. Sec. 11, Ch. 427, L. 1999.