I had tax related questions and was hoping someone could help. I am from Pakistan, I came to the US on an F1 visa in July 2005 and my status changed from F1 to H1B on October 1st 2007. I have been working full time since Aug/1/2007. Am I a resident or non resident alien? Can I claim the standard deduction? Can I claim a deduction on my taxable income based on the Pakistan/US tax treaty? Thanks in advance.