we need fingerprint for EAD renewal?

I just called USCIS and they told me: finger print is needed whenever you file a new application. Is that correct? That means I need finger print before the case is approved?
It has been more than 2.5 months already, I haven't receive the notice to do finger print yet. I can't imangine how long I still need to get the EAD renewal?
Please help me out if you did not long time ago.
Thanks a lot.