Prakash ji, I think I was not concise earlier. What I was referring to was, hamle pahile student hunda worked in check and paid all four taxes. Even in my UG OPT I paid all taxes. School time ma summer and all was also in check with all the taxes (gair kanuni). Now, suddenly if I move to non-immigrant status with my EAD card or visa sent to IRS to save tax on SS and Medicare, would it not trigger red alert? I can ask the HR hola, but if they send the doc to irs, would it not be rather risky come next tax season? Hope I put it concisely this time around.