Read the general professional work overview
When preparing another period of TN work, start with the assignment now proposed. An old employer letter explains an earlier request; it may not accurately describe the current duties, compensation or duration. Keep the history, but do not treat a previous approval as proof that every new arrangement qualifies. Hypothetical example: an air-quality modelling statistician receives a renewal letter that repeats an old worksite even though the current project moved. The decision is whether the stated assignment still describes the work that will be performed, not whether the old letter was once accepted. For a Canadian citizen, a renewed TN request may be presented for inspection or an employer may seek USCIS classification; TN cannot be used to run an enterprise in which the applicant has controlling ownership.
Compare the earlier and proposed assignments
Mark changes in employer, responsibilities, worksite and remuneration. Have the employer explain what remains the same and what has actually changed. Do not silently recycle an old date or remove a changed responsibility to make the documents match. The appropriate extension or admission procedure depends on the individual circumstances. Prepare a dated comparison of the prior and proposed assignments, then have the employer confirm every material difference. This gives the reviewer a candid record rather than a packet that appears internally inconsistent.
Recheck the professional basis
Canadian or Mexican citizenship, a listed professional activity and the profession’s own qualifications remain relevant. The intended entry must be temporary. A required degree cannot be replaced simply by counting years in the same job. Where the degree comes from an institution outside Canada, Mexico or the United States, preserve the required reliable evaluation with the underlying credential. Match the position to the listed profession before ordering translations or evaluations. The critical record is the governing profession requirement and the applicant’s credential, not an attractive job title alone.
Keep status dates separate from project dates
Record the current admission document’s end date and the proposed work period separately. Seek review before authorization expires; a project extension does not itself extend status. Any period of continued work while a request is pending depends on the applicable rule and filing facts, not merely the employer’s intention to keep you. Create a calendar for document validity, intended travel and the requested work period. If a filing is chosen, confirm its receipt and status rather than treating an internal company deadline as permission to continue working.
What else is on your mind?
Is a matching job title enough for TN?Can years of experience replace a degree for TN?Can my own U.S. company employ me under TN?Can my spouse work if I hold TN status?Editorial source review: 2026-09-07. General preparation guidance, not an individual assessment.