Did your employer provide dependent care benefits that were excluded from your gross income?
If that's the case, you have to reduce the expenses for dependent care by the amount of dependent care benefits provided by the employer, and this could possibly explain what you're seeing. See the IRS' Topic No. 602 Child and Dependent Care Credit for more information.
You might also look at the TurboTax Help article What is the Child and Dependent Care Credit? to verify you meet all the requirements to claim the credit.
