Hi. I have been in the states since January 2006. I am here on an F1 visa with my wife and other two kids who are on F2 visa. I have filed taxes all the years I've been in the states as a nonresident alien. Now can I file this year as a resident alien for tax purposes since I've been in the states for five years? Can I claim my kids as dependent? And which would be better to file as resident or non resident alien? Thanks