Received an email stating that my tax return is put on hold for 48 hours . However, my returns were accepted and I owed taxes. What should I do?

This is the email I received:
From: xxxxxxxxxxxx@xxxxxx.xxx
TurboTax Customer Support: x-xxx-xxx-xxxx
We've noticed that someone attempted to fill out a tax return using your information with a different account.
We are holding the tax return for 48 hours to give you the opportunity to verify it's yours or stop it. If we don't hear from you within 48 hours, this return will be filed in accordance with IRS filing regulations
Thanks,
The TurboTax Security Team

Furthermore, it does not state if both federal and state tax returns are on hold or just one of them.

Is this legitimate? Or possible scam?