Amend to remove dependent for purposes of dependent care

How do I remove one child for purposes of the dependent care credit?  I'm only allowed to claim one under an agreement with my child's father, but when I add one child, Turbotax automatically adds my second child with the message "since you've paid $6,000 for [first child]'s care and the limit is $3,000 per dependent, we can add [second child] and increase your credit by $200 even though all expenses were paid for [first child] only."  I can't override that option to remove second child.  Please help!