I came to US over 18 years ago and never went back, I had a I-94 that I lost short time after I came.
I'm working on filling out the forms "by myself" but I encounter the question in the I-485 about the number in the I-94.
My question is do I have to replace that document (I-94) to fill out the I-485 form or it doesn't matter if I leave it blank?
Thanks for the help.

