Yes. After 5 calendar years...

来源: 于 2004-02-25 10:15:50 [旧帖] [给我悄悄话] 本文已被阅读：次

being a non-resident alien, you have to become a resident alien, then you have to pay SS and medicare tax.

There is a said when you decide to leave US permenantly in
the future, you may claim back all of them that you paid
all these years. But I don't know how.