Question: Hello I am a Pakistani; I live and work for the State of CA. I am married, but my wife and kids are citizens of Pakistan (and they live in Pakistan a well). Should I file as single?

Answer: Having a spouse who is a citizen of Pakistan does not make you single. Your choice is MFJ and includes her income on the return, or MFS and only deal with your income. There is also an option of filing as Head of Household if there are qualifying kids or relatives who meet the dependency, support, citizen or resident test. See this thread You cannot not claim any of the kids as dependents, as they fail the citizen or resident test

References/Related Topics

Need ITIN for wife even though “Married, filing separately”?

Claiming a Non-Citizen Spouse and Children On Your Taxes