I filed with another TurboTax account I created and later received a Security Alert email. It placed my returns on hold for 48 hours and asked me to call TurboTax Customer Support.
When I called the number provided, the automated system asked me questions like 'if I was calling about the email I received" and 'whether I am using a different account this year.' I answered yes to both. After providing a few more security tips and thank yous, the system hung up.
Is any further action needed?