N.M. Code R. § 3.1.9.13
A. A refund or credit of tax may be granted to a taxpayer by the secretary or secretary's delegate only if all the following conditions are satisfied:
(1) the tax has been erroneously paid and payment has been verified from the department's or taxpayer's records;
(2) the taxpayer has submitted a proper claim for refund pursuant to Section 7‑1‑26 NMSA 1978 and the regulations thereunder; and
(3) the secretary has secured the prior approval of the attorney general for any refund of tax and interest erroneously paid when such approval is required in Subsection A of Section 7-1-29 NMSA 1978.
C. A taxpayer may not create a credit for a discovered overpayment of tax by understating the amount due on current tax returns to offset amounts paid on prior returns.
[7/19/67, 11/5/85, 8/15/90, 10/31/96; 3.1.9.13 NMAC - Rn, 3 NMAC 1.9.13, 1/15/01; A, 12/15/11]