It's hard to tell what the problem might be, since we can't see your tax return. (And don't post it. This is a public web site.) A lot of requirements have to be met in order to exclude the dependent care benefits. I suggest that you go back through the questions in TurboTax, read the questions very carefully and check your answers. Review both the section for the child and dependent care credit, and also the questions in the W-2 section after you enter the information from the W-2. You could also try going through the Smart Check to see if it finds any errors.
What is your filing status? If you are married filing separately you cannot exclude the dependent care benefits unless you meet certain requirements, which TurboTax asks about in the child and dependent care section. If you are married filing jointly, a common problem is that your spouse does not have income from working (either a W-2 or self-employment), or you have not entered your spouse's income.
If you have further questions, please tell us whether you are using TurboTax Online or the CD/Download TurboTax software.
