I came to USA in June2009. I am a L1 visa holder and having a SSN. I bring my family to US on November2009 as a L2 visa holder. My w4 form exemptions is 5. Am I a resident or non resident alien?
My wife doesn't work but has an valid SSN. Am I eligible for Child Tax Credit?
I want to ask which status we should file. Can we file jointly? Please clarify.

You can file resident tax return as Married Filing Jointly. You will get standard deduction of $11,400 and exemptions ($3,650 each) for both of you and the kids. You will also get child tax credit of $1,000 each. You can also deduct moving expenses. Use form 3903. Your U.S. Tax Return: Moving Expenses

You must both declare your worldwide income for 2009. If you have any foreign income, and on that income you paid taxes in the foreign country, then you can claim foreign tax credit (Form 1116) or you can use Foreign Earned Income Exclusion (Form 2555). Your U.S. Tax Return: U.S. Citizen or Resident with Foreign Income