New Mexico State Tax Rulings
Free plain-English summaries of state tax letter rulings and advisory opinions issued in New Mexico, with full citations and the original source on every page.
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My tax check got lost in the mail even though I filed on time — do I still owe interest for the months the tax went unpaid?
Yes — interest keeps running until the tax is actually paid, even if your check was lost in the mail. Franklin and Shirley Niles mailed their 1994 New Mexico income tax return in early April 1995 and …
My extra tax only got pinned down years later after the IRS adjusted my return — does interest really run all the way back to the original due date?
Yes. Interest on unpaid New Mexico income tax runs from the original due date of that tax — not from when a federal adjustment is finalized or an amended return is filed. Donald Duszynski, a New Mexic…
The Department says I never paid, but I'm sure I mailed my return and a check — can I win with just my word?
No — uncorroborated testimony that you paid isn't enough to beat an assessment. Peter Grivas, a New Mexico resident, was assessed $2,158.27 in personal income tax plus interest and penalty for 1991 af…
I made an honest mistake on my return that the Department could have caught but didn't for years — do I still owe interest on the tax I underpaid?
Yes. Interest is owed on any underpayment of tax, even an honest error the Department could have caught from the face of your return but didn't. Emiel Bosman, a New Mexico resident who worked as a tra…
I'm a New Mexico resident but I work out of state most of the year — can I pay New Mexico income tax on only the fraction of the year I'm actually here?
No. A New Mexico resident is taxed on 100% of their income no matter how little time they spend in the state — there is no time-based apportionment for residents. Darrell Bowers was an offshore drilli…
Could William Midkiff reduce mandatory interest on 1990-1991 personal income tax deficiencies because the 15% statutory rate exceeded market rates, his children had overpaid tax on the shifted income, or the Department assessed him years later?
No. Section 7-1-67 required interest at 15% per year from the original tax due dates until payment. The hearing officer had no authority to substitute a market rate, one taxpayer's payments could not …
Could New Mexico refund $828 of overwithheld 2001 income tax when the taxpayer did not file the refund return until December 2006?
No. The 2001 income tax was due April 15, 2002, so the statutory period for claiming the $828 overpayment ended December 31, 2005. Rose Bilat did not file until December 2006. Her medical problems, he…
Could Andrew Burg carry a net operating loss established on his 2000 return back to erase 1998 and 1999 New Mexico income tax because federal law and an IRS employee allowed the federal carryback?
No. New Mexico added back the federal Section 172 NOL deduction when calculating base income and provided its own exclusion only for carryovers to later years. An NOL first established on a timely 200…
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These are official tax letter rulings and advisory opinions issued by New Mexico's revenue authority in response to questions from specific taxpayers about how the tax law applies to their facts. A ruling is binding on the department only for the taxpayer who requested it and cannot be relied on by anyone else, but it is strong evidence of how the state reads the law. Every ruling above has a plain-English question and short answer, plus a link to the full original source.