Thanks! I will check the

artiles to read. As for the Retirement plan, the university gave me three choices: Social Security; Optional Plan; and StateSpecial. The officer in HRO suggested me to take the StateSpecial one since the money I put could be drawn whenever I stop to work here. But the other two have limitations for taking money back, such as service for ten year, or over 60 years old. In my current pay check, the retirement fund and medicare are already deducted, no others. Is those you said the SS and medicar tax? Sound like. Anyway, thank you.