I HIGHLY RECOMMENDED you use an attorney for all Immigration matters, especially a brand new waiver procedure that is quite involved and difficult. Your particular fact pattern also raises some serious concerns as you have lied about your LPR status systematically, and making a false claim to US citizenship can't be glossed over. Get to an immigration attorney familiar with waiver law. This is no time to put your family at risk with DIY lawyering.
Definitely talk with an attorney in details as to what your chances are and what you need to do...
Att. number 917-885-2261 This advice does not create an attorney client relationship. No specific legal advice may be offered by the lawyer until a conflicts check is undertaken. Information sent through a web form or via email may not be treated as confidential. Please accept my apologies for spelling mistakes. Law Office of Alena Shautsova , New York Immigration Attorney http://www.shautsova.com Blog: http://www.russianspeakinglawyerny.com
I second my colleagues. You need to contact an experienced immigration attorney as soon as possible. A Clarification, I-9 form is not an IRS form. Employers must verify the identity and employment authorization of each new employee using the form I-9. This verification is enforced by ICE. In other words, this is a USCIS form.