Please try typing it in without the forward slashe...
New Member

Filing

Please try typing it in without the forward slashes, example: Jan 25th, 1970 would go in as 25011970.

If that doesn't do the trick, is it possible you're running TurboTax is a mobile browser? If so, try switching to a computer to enter your birthdate. You can switch back to your mobile device once you're past this step.

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