回复：回复：回复：回复：回复：请教皮匠，863211，及各位大侠同学!!

thanks again.
if my current H-1B expires in Dec. 09 but I want to start to use EAD right now. What should I do?
just fill up i-90 from your employer to document that your are using EAD? Anything else? How could USCIS know I am not using H-1B anymore but on EAD?