I applied citizenship in july 2015. and i just got invitation letter for test and interview on 9th april in Mississauga. I have one question about interview. I am living in canada from 2003.I never travelled outside canada.I am living in same address from 2003.But from last 4 to 5 years.I am self-employed or cash worker.I filed my all taxes.I just want to know which document i can show to cic officer for my employment or any other documents please give your advice thank u.