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You have to file a New Mexico Income Tax Return as a non-resident. What you read were the requirements to qualify as a resident of New Mexico.
New Mexico, as does all states, require that income tax returns be filed by a non-resident for all income earned in the state.
Part year and non-residents must file if they if they are required to file a federal income tax return, and receive New Mexico source income.
I am attaching a link for you to download the form and instructions:
The following is an excerpt from page 2 of the instructions:
"You are a New Mexico non-resident if you were not domiciled in New Mexico for any part of the tax year and you were not physically present in New Mexico for at least 185 days. Military personnel who are temporarily assigned to New Mexico, but who have established residence in another state, should claim non-resident filing status."
If yo have any additional questions on this topic, be sure and get back to me.