IDnotify is a third party provider not owned by TurboTax or Intuit. It is owned by Experian.
See this TurboTax support FAQ for IDnotify - https://ttlc.intuit.com/turbotax-support/en-us/help-article/account-management/sign-idnotify/L33FBuj...
Go to this website to sign onto your IDnotify account - https://www.idnotify.com/
