Are you using the Online TurboTax product or the CD/download, and is the latter, is it for Windows or Mac?
When you re-enter the Child and Dependent Care interview, the first things you should see is a table of your dependents for whom you spent money for Care.
If you hit Continue, the next screen should be titled, "Here's what you spent on care providers". On the desktop version of TurboTax at least, there is a column headed Amount Paid, and the provider for whom you did not enter any expenses should show zero (0) here. In any case, you should be able to Edit each entry one by one to see what amounts you entered.
You say you can't modify the providers. Even when you click on the Edit button? That should not be.
Tell me what you are doing when you try to modify the provider.
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