L1 visa, filing tax returns for dependents, self
I was on L1 visa work permit in US, Foreign National from Jan 2006 - Mar 2006 and Jun 2006 - Sep 2006. My wife and my kid stayed with me for the entire period. She was on L2 visa.
I have received my W2, and would like to know few things related to tax return
1) Was my wife eligible to apply for SSN as we did not apply for one?
2) Can I file the tax return as "Married Filing Jointly"? My wife does not have SSN as well as ITIN at the moment
3) Does it require being physically present in order to apply for ITIN/SSN? As we are not in US and can only operate through email or postal service
Please suggest the status under which I can file my tax returns.
Also suggest how much difference in tax (approximate figure) will be there if I have to file as single. My approximate gross pay for the ~7 months period is ~$38k
Thanks in advance.
Ashish