You can either file I-539 to change your TN to B2 within US or just go to the US-Canada border and reenter US from Canada using your passport just as you did for your TN.
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• 萬分感謝,8老師,非常清楚了 -qq73- ♀ (0 bytes) () 03/15/2018 postreply 08:18:28