How long in advance of your start date is it acceptable to enter the US on a TN visa? My start date is late September but I'd like to go in early September. Is this a problem?
Could be. The best way is to have no start date on the letter.
After 20 years, I am severely cutting back on responses. Do not ask specifically for my help. There are a few others on this board that can answer most questions. All the best