Yep yep. So no need to amend prior years. I'm good there. And I'm good for 2009 because I claim 2 of mine, plus my step-daughter, so that's 3.Yes, you can amend prior returns if it will benefit you. I believe you can go back and do 2006-2008. 2006 would have to be completed PRIOR to 04/15 - otherwise that one falls off.
Now, would you not have qualified with stepdaughter and the youngest child?
I guess next year I'll have to figure it out.