If you filed your return using NETFILE, you would have gotten a NETFILE confirmation code. If you don't have a confirmation code, you still need to submit your tax return using NETFILE. Not sure how? Follow these instructions for TurboTax Online or TurboTax Desktop.
If you did get a NETFILE confirmation code, or you filed by fax or mail, then you'll need to contact the Canada Revenue Agency (CRA) to ask what the status of your return is. You can check using My Account, or If you are in Canada or the United States, you can call the CRA at 1-800-959-8281. If you are elsewhere, you can call 613-940-8495. This page has more ways to contact the CRA: Contact the Canada Revenue Agency