8老師，您好！
我女兒用TN簽證在美國工作，還有幾個月她的簽證就到期了。
-She may discuss it with the employer to see whether her TN status can be extended before it expires.
因為她是加拿大籍，我聽說到期後它還可以在美國待最多180天，想問問您是這樣嗎？
-No. When her TN I-94 expires, she has to leave US unless her TN extension application is filed before the I-94 expires.
我們住在美國，想讓孩子和我們多呆些日子。
-If her employer do not extend her TN status, she may file I-539 to apply for change of status from TN to B2 before TN I-94 expires. Thus, she can stay in US for a while.
謝謝！
