After calling TurboTax support and spending quite some time on the line we finally figured out what was going on. I had entered everything except one 1099-DIV from my stock brokerage that wasn't yet released. The result of this was that I had NO TAX LIABILITY yet. Hence no tax credit. Once I entered the 1099-DIV my tax liability shot up and the credit appeared. Cudos to the support girl that figured this out, but it really would have been better if the program told me WHY the credit wasn't allowed rather than just stating it wasn't.
Problem solved.
