If the letter leaves professional eligibility unresolved, treat family travel as dependent on that issue being addressed. Rewriting may clarify an eligible role, or it may reveal a problem with the proposed category. Potential TD status for family members does not resolve that uncertainty.
Separate document progress from application readiness
Family passports and relationship evidence can be organized while the employer clarifies duties, but an updated draft alone is not a decision. Ask when the supervisor will confirm the final description and when eligibility will be reassessed. Avoid making the household budget depend on a spouse working in TD, which itself provides no employment authorization.
Plan how you would handle a changed start date or different immigration route if the employer’s accurate explanation does not support the original TN assumption. Distinguish the letter being finished from the case being ready, because a household watching a document go through drafts tends to treat each version as progress toward permission. It is not.
The letter is one input; the qualification evidence, the category assessment and the procedure all sit alongside it, and any of them can change the position after the wording is settled. Hypothetical example: a household in which one partner works as a technical publications writer and is considering whether to give notice should tie that decision to the case being assessed as a whole rather than to the employer producing a signed letter. Keep travel and housing arrangements reversible until then, and remember that TD status carries no permission to work, so a second income needs its own separate basis.