I am applying the greencard for both my parents. I have several questions, and could anyone please help?
1. In Form I-864 "Affidavit of Support", Part #6, Item #25 "Federal Income Tax Return Information", it looks it is optional to submit the photocopies of the Federal tax returns for my second and third most recent tax years. Could anyone please advise at what circumstance should I submit them so that it helps the application, versus only submitting the most recent year?
2. In Form I-485 "Application for Register Permanent Residence or Adjust Status", Part 3 section "B", should my father check "yes" in the item "applying with you" when he fill in the information for my mother as his family number? My mother does apply at the same time, but she files a separate I-485.
Thanks advance for help!

