The number looks valid as per the Intuit security support person I spoke with, but I strongly recommend only using the Support call-back feature to be safe, since it requires an account login, provides a specific number to call, assigns a case number, and you immediately receive a callback from a human Intuit representative. Apparently when someone who has the same last 4 digits of your SSN files a tax return in TurboTax from a different account it will log this in your account activity and email you the alert. The security support representative can investigate and confirm if the other account used a different but legit SSN that just happens to also have the same last 4-digits as you. I did not provide and was not asked to provide any portion of my SSN to support. I only had to confirm name, zip, phone and email.
