Provide concrete examples and the actual assignment of responsibility for this position.
Avoid invented percentages
Use reliable facts about recurring work. A precise-looking time allocation should not be fabricated solely to create a preferred immigration characterization.
Carry the same core set every time: proof of citizenship, the employer's support letter describing the professional position and duties, credential evidence for the listed profession, and records of prior admissions. A file for a multi-site assignment should open with a short written explanation of the arrangement: the employer's name, the fact that the therapist is its employee, the client facilities where services will be delivered, who supervises, and the expected duration of the engagement. Dated letters from each previous employer stating the position, duties and period, on letterhead and signed by someone who can confirm them, together with the diploma and transcript. Avoid ordering credential evaluations, translations, or employer letters tailored to a TN filing until citizenship eligibility is confirmed, since none of that preparation applies if the applicant does not hold qualifying citizenship. Request the amendment filing or a registry extract showing the former and current names, along with a short statement from the employer confirming that the position, duties and terms are unchanged. Build the letter around facts the employer can presently confirm: the employing entity, professional duties, compensation, temporary period, supervision, and the method for selecting a site.