I did a extension last night and didn't get a email.
You may need to re-submit your extension request. Sign back into your TurboTax Account, click on Tax Tools in the left-side navigation, then Tools. In the Tools Center, click on File an extension in the list under "Other helpful links".
You have clicked a link to a site outside of the TurboTax Community. By clicking "Continue", you will leave the Community and be taken to that site instead.