N.M. Stat. § 7-2-18.16

A. A taxpayer who files an individual New Mexico income tax return, who is not a dependent of another individual and who adopts a special needs child on or after January 1, 2007 or has adopted a special needs child prior to January 1, 2007, may claim a credit against the taxpayer's tax liability imposed pursuant to the Income Tax Act. The credit authorized pursuant to this section may be referred to as the “special needs adopted child tax credit”.

B. A taxpayer may claim and the department may allow a special needs adopted child tax credit in the amount of one thousand dollars ($1,000) to be claimed against the taxpayer's tax liability for the taxable year imposed pursuant to the Income Tax Act.

C. A taxpayer may claim a special needs adopted child tax credit for each year that the child may be claimed as a dependent for federal taxation purposes by the taxpayer.

D. If the amount of the special needs adopted child tax credit due to the taxpayer exceeds the taxpayer's individual income tax liability, the excess shall be refunded.

E. A husband and wife who file separate returns for a taxable year in which they could have filed a joint return may each claim only one-half of the special needs adopted child tax credit provided in this section that would have been allowed on a joint return.

F. As used in this section, “ special needs adopted child ” means an individual who may be over eighteen years of age and who is certified by the children, youth and families department or a licensed child placement agency as meeting the definition of a “difficult to place child” pursuant to the Adoption Act; provided, however, if the classification as a “difficult to place child” is based on a physical or mental impairment or an emotional disturbance the physical or mental impairment or emotional disturbance shall be at least moderately disabling.