Deductions & credits

This is helpful.  However it is interesting how much the tax refund is affected without the amount in this box.  Even if I added $5,000 back into my income and then take out the $5000 from the FSA, the refund goes up about $1,500.  It makes me feel like I have missed a step in the claims and deductions because it doesn't seem like this would effect my taxes that much.