Do non resident alien on L1B visa needs to pay any federal tax,if yes then how much more/less this is as compare to resident aliens for the same duration.

Thanks.

When did you come to the U.S. Are you married?

When did you come to the U.S.? Are you married?

I came to USA on work permit (L1B).frm feb to June 2008 (150 days).I am single & had workes as software engineer in CA.

Yes, you need to pay U.S. tax as a nonresident alien. You do not qualify to file as a resident alien. File Form 1040NR.