Go back to the My Info section and edit your dependents. You will step back through all of the dependent questions. Go through them slowly and you will be able to indicate that they are citizens are enter their social security numbers. You can also delete them and re-enter them if you have problems (instructions are linked). If you are trying to delete Form 4547, see below:
How to delete forms in TurboTax Online
How to delete forms in TurboTax Desktop
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