I'm a student and I only worked part-time during college the past three years. I haven't filed for any of those years. Now I am married and am filing an I-130 / I-485 for my wife. Form I-864 requires me to acknowledge that I have filed my federal taxes for the past three years and include a copy of my tax return for the most recent tax year, but I haven't done that. Can I get around this somehow? I am having a co-sponsor who did file, but I didn't.