Do you remember what TurboTax had as the imported basis amount? To confirm you didn't make changes to your 2021 return after filing?
If you verified your basis amount from 2021 and prior years then enter $423 from line 14 of your 2021 Form 8606. For the explanation enter "$423 as shown on the 2021 Form 8606 line 14. Error when transferring data".
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