Hello,

I've couple of questions to you experts.
I've worked in US on L1-B Visa for the entire year of 2006 and 2007 and stayed up to march 26th 2008. I was here again on 14th Dec 2008 on L1B again for work and likely to stay here until July 2009.

Q1) Filing taxes for the year 2008, Am I a resident alien or non-resident alien ?

I am married as of 31-dec-2008 and my wife stays with me in US from 14-dec-2008 on L2 dependent visa.

Q2 ) Should I file married filing jointly or married filing separately ? If married jointly, what are the things to be taken care of?

Thanks.

You are resident for 2008. You count 1/6 days of 2006 plus 1/3 days of 2007 and days in 2008. You can file joint return as residents. You will attach W7 (ITIN application) for your spouse. Read Your U.S. Tax Return: Substantial Presence Test