前几年公司帮我申请绿卡，自动把我孩子也申请了绿卡，现在孩子不愿过来， 老婆也不愿意过来. 两年也就偶尔周未过来， 现在孩子在加拿大上大学，我说既然不过来， 就主动取消算了， 老婆说不主动取消，反正不来，就看海关什么时候自动吊销绿卡。
-Your wife and kid had better file I-90 to abandon their green card. Then, they can visit you using their Canadian passport as visitors.
我孩子刚18岁，要主动取消吗？
-Yes.
我老婆如果取消绿卡退休时还能拿美国我的ssn吗？
-Yes. When you retire to get your SS retirement benefits, she can have the spouse retirement benefits after you retire when she reaches the retirement age (62 for early retirement, or 66-67 for full retirment).
家人都在加拿大
