I came to US on March 31 through L1 Visa and I now I am in US Payrolls.And for every payslip I am paying the following Taxes.

W/H EE Federal
OASDI EE Federal
Medcar EE Federal
W/H EE Illinois(State)

If I stay in USA less than 6 months then I will get the money that I paid for Taxes please let me know.

You may get SOME of the federal and state taxes back.

The OASDI and Medicare taxes are GONE FOREVER! :-)