Tax return form, please helps many thanks suewei2006-08-22 00:43:05

I am going to 485 interview soon. I am on F1 , have been on F1 for 4 years. married to my hu*****and ( US C) last year.
I only have last year's joint tax return form with my hu*****and.

I don't have my own tax return for the three years before that .

Where do I request the tax forms, or W2? do I need them for the interview?
many thanks