The actual proposed professional activity still needs a clear and truthful explanation.
Separate location uncertainty from the job itself
Identify the duties and relevant listed profession based on the genuine engagement. Do not use an unresolved address as a reason to substitute a generic job label for the employer’s actual proposed work.
Before finalizing the offer, match the real duties to one particular profession on the USMCA list; an undecided site does not permit a generic role description. Confirm that the applicant is a Canadian or Mexican citizen, not merely a Canadian permanent resident, and holds that profession’s specified education, licence, or experience. The engagement must be prearranged with a US employer or other qualifying entity, and TN cannot be used for self-employment. Disclose any ownership interest instead of obscuring who controls the work. For a Canadian, the procedural choice is generally an application at a port of entry or an employer-filed Form I-129.
Hypothetical example: A forestry engineer from Saint-David-de-Falardeau receives an offer covering several facilities whose final allocation is pending. The employer should describe her forest-road design and resource-assessment duties, identify Engineer as the claimed profession, document her engineering qualification, and state truthfully how assignments will be allocated before anyone books travel. Substituting “project consultant” until an address is chosen would leave the essential professional case unexplained.