A TN visa is a nonimmigrant employment visa that allows citizens of Canada and Mexico, as NAFTA professionals, to work in the United States in prearranged business activities for U.S. or foreign employers. Here are some key points to know about TN visas:

• Canadian citizens are generally eligible for admission as nonimmigrants without a visa, but they can apply for TN nonimmigrant status at a U.S. port-of-entry or have their employer file Form I-129 on their behalf.
• Mexican citizens must obtain a TN visa at a U.S. Consulate or Embassy to enter the U.S. .
• TN status is available to Canadian and Mexican citizens who work in specific professional occupations.
• Permanent residents of Canada and Mexico are not able to apply for TN visas to work as NAFTA professionals.
• A consular officer will interview applicants to determine their qualifications for a TN visa, and additional documents may be requested to establish if they are qualified.
• When completing Section 1 of Form I-9, Employment Eligibility Verification, an employee in TN status should select “A noncitizen authorized to work” and enter the admission number and expiration date of their status as indicated on Form I-94/Form I-94A, Arrival/Departure Record. The employee’s unexpired Form I-94 together with their unexpired foreign passport is acceptable as a List A document for Form I-9.

Overall, the TN visa is a way for Canadian and Mexican citizens to work in the United States in specific professional occupations.