I know even though I am the residential parent, we have to "divide" the kids on our taxes and then we rotate the pair because of their ages. I know crazy!
So perhaps one year you get to claim her on your taxes and the next year she does. I am not sure how that would work on your FSA...perhaps the same. Have you spoken with your L or even the HR department at work?
kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory