I am on F1 visa (Graduate) and married. My wife has no SSN. I think she has to apply ITIN. Last year I worked on CPT status. I received W2. I was graduate student and I also have 1098T form University. Can I use 1098 T for Tuition Credit. Which form do I need to fill? Should I file taxes as Married filling jointly or married filing separately? Look forward for your reply. Thank You.