Did you file your taxes with TurboTax?  Only you would know if you filed with TurboTax or not.  If you e-filed, you can check the status of your return.  It would show whether your return was accepted, rejected, or no return filed.

How do I check my e-file status?

https://ttlc.intuit.com/community/return-status/help/how-do-i-check-my-e-file-status/00/25538