Need to go to newark with my parents for their green card interview tomorrow. Not sure what to prepare. I made copies of the supporting document. But i don't have the copies of the submitted forms, e.g. I-485, affidavit, etc. When I was preparing for the forms, I simply printed them out from pdf files and didn't make copies. Is it going to be a problem if I go in without those forms? I do have employment letter, past year's tax return, w-2, latest pay stubs to show financial support for my parents. What kind of questions would I need to prepare for. I know it is an interview for my parents. But I will be there to help out. Thanks!