Credit other contributors accurately and explain the applicant’s own professional reasoning.
Make attribution easy to verify
Give each element its own document and arrange the package that way rather than chronologically. Citizenship of Canada or Mexico is proved by a passport or citizenship certificate, never by a permanent resident card. The prearranged, temporary character of the work is proved by the U.S.
party's letter, which should describe the analysis expected in plain language and use the USMCA schedule's own term for the profession instead of an internal job title, while also stating the period requested, the compensation and the reporting line, and that letter has to exist before travel rather than be assembled at the counter. The profession itself is proved by the same letter naming the schedule entry the duties fall under. The qualification is proved by the degree and transcript, or by the licence certificate showing current status and scope: one route documented completely, not fragments of two.
A degree issued outside Canada or the United States usually needs a credential evaluation before it can be read against the schedule entry. Where collaborators contributed, attribute them by name and function, keep version histories showing which conclusions were the applicant's own, and let accurate attribution stand rather than claiming sole authorship the records cannot support. Because TN does not permit an applicant to serve a U.S.
enterprise they own and control, any equity or officer role belongs in the disclosure alongside the corporate documents. Keep originals with a dated index, and ask a U.S.-licensed immigration lawyer about any document you are unsure of.