No. A corrected record does not grant immigration permission. Review the actual TN process and authorized arrangement before starting work.
Avoid conflating accuracy with approval
An accurate file is necessary preparation, but it is not itself an admission or status decision.
Work backwards from the first date the applicant must lawfully be doing the work, then insert the steps that have to precede it: the structural review, any restructuring the employer agrees to, the credential evidence, and the employer letter. A first review should produce a sequence: resolve the professional match, collect the executed terms, select the procedure, and travel only when the record supports the request. TN admission is granted for a period not exceeding three years and is tied to the employment described, so an application made against an unsettled plan produces either a refusal or an authorization that no longer matches the work. Because the employer's offer will be conditional on licensure, this is the item that most often moves a planned start date, and it should be begun as soon as the board permits rather than after an immigration question is settled. Because TN requires prearranged professional activity and bars self-employment, verify that any preliminary calls or site visits do not become productive services before admission or other authorization.