You may only apply $1000 of the leftover $7000 towards claiming the dependent care credit . There is a $6000 limit ($3000 with one kid) on claiming child care tax benefits. Since you already used $5000 for DCB, you only have $1000 left for DCC
Yes, you can claim the amounts that are greater than the amounts that were part of your dependent care benefit. Go through the Child and Dependent Care section, and enter your entire cost. The amount from box 10 of your W-2, which shows the child care benefits that were provided through the dependent care benefit, will reduce the amount of your credit, but you will still be able to claim a credit for the additional expense.
The following FAQ will guide you to entering these expenses. https://ttlc.intuit.com/replies/4395614