I was told by a Turbo Tax representative to submit a picture of a photo ID as proof of identity.
If you are trying to recover your account, this TurboTax FAQ has the directions. Part of that process is showing an identificaiton.
https://ttlc.intuit.com/questions/1899319
Is there a link to upload my picture ID to unblock my Intuit Turbo Debit Card??
How to upload a photo of my license or Turbo Visa card
@Pucklee wrote: How to upload a photo of my license or Turbo Visa card
A picture of a license or a credit/debit card cannot be imported or uploaded to a TurboTax tax return.