Document delivery does not grant immigration permission. Review the actual TN process and authorization before relying on the start.
Keep preparation and decision distinct
A completed file item is not a completed admission or status determination.
Build a sequence from the employer's final letter, credential readiness, any licence issue, the intended request or filing method, inspection or adjudication outcome, and the individual's actual admission record. State surveying licensure and any required examination usually take longer than the immigration step, and a start date built around a field season leaves no slack. List every dependent's step beside the party that controls it: the consular post controls appointment availability, a registry controls how quickly a certificate is issued, an inspecting officer controls admission on the day, and the employer controls the start date. Admission is granted for a period not exceeding three years and is tied to the employment described, so applying against a schedule that is still moving produces either a refusal or an authorization that no longer matches the work.