Question about the deductions of salary.

來源: 於 2007-06-12 15:10:38 [舊帖] [給我悄悄話] 本文已被閱讀：次

At present I am holding a H1b visa. Since I began to work for this company, there are two more deductions (OASDI and Medicare) from my salary in addition to FIT and SIT(state and federal taxes).
I know the last two deductions are normal. Should we pay the first two deductions before we get green cards? Are they required by law?