what's the proof for first year of working for sponsored employer to show at citizenship interview?is it just tax returns got from first year's employer?or should I have something more like W2?and what else should I take to the interview?(assuming that I had no trips more than 1 month outside usa)also does officer asks tax return of EB gc or it's just needed from gc through marriage and extended absences from usa?plz advise me,thanx