If you didn't fill G-28 form for EAD application, any materials should be sent to you.
BTW, did you do that online? If yes, that might be the reason for your RFE. It is easier to do that by mail since you can include your relevant materials.
BTW, did you do that online? If yes, that might be the reason for your RFE. It is easier to do that by mail since you can include your relevant materials.