There is actually a way to apply to the TN ahead of time now, it’s a pretty recent change (well, 2012): https://www.uscis.gov/archive/archive-news/new-filing-op

There is actually a way to apply to the TN ahead of time now, it’s a pretty recent change (well, 2012): https://www.uscis.gov/archive/archive-news/new-filing-option-behalf-canadian-tn-nonimmigrants https://www.uscis.gov/archive/archive-news/new-filing-option...