See the post by KrisD15, above. If you (hopefully) saved a copy of the return with the deductions still there, you need to convert the ones with cash donations into an "item" with a description of "cash" and a value of the amount of cash you donated. I added the item, then deleted the money entry for each of the charities I donated to since I couldn't see how to simply change the existing entry.
If you already deleted the deductions, re-enter them but use the "items" donaton and "cash" description when you enter any money donations.
You must also do the same thing for any mileage donations, or TurboTax will consider them as cash and when it chooses the Standard Deduction it will have a value and not ask you about line 12b. For each mileage entry, I noted the calculated amount, then added an "item" with the description of "mileage <# of miles>" and used the previously calculated value as the "value" entry.
By doing this, I was able to get TurboTax to finish and kept my state donations intact.
God luck!
- Robert
