I am currently holding F1 student (OPT status) visa and worked several months last year in a company, the salary on my W2 is somewhat around $30k. I am married and my wife has been in US since March 2012 with no job or income (she doesn't have ITN or SSN). I have been in US less than 3 years.
I figured out that I should file 540NR Long with accompanied Schedule CA (540) attached. My question is, can I file the tax jointly or married filing separate? Since my wife doesn't have any income at all, can I simply file 540NR Short? Is Schedule CA (540) a must document?