I completed an application online and it asked questions like " are you a U.S. Citizen, a lawful permanet resident, asylee or refuee?" then "If not, are you currently eligible to work for all employers in the United States on a full-time basis?" and finally " Please explain the basis for your employment authorization" So my answers were: No, Yes, and Received Employment Authorization Document on 10-2-12 effective until 10-1-14 under an approved I-821D Deferred Action for Childhood Arrivals application. This is for a job in a lab with a hospital network, so might be similar for you when you start applying? I say you just state it if asked, no need to lie 'cause it's all legal