When you filed your return, you should have received a confirmation number from the CRA. Here's how to find your CRA confirmation number:
https://turbotax.community.intuit.ca/questions/1518044-how-do-i-find-my-netfile-confirmation-number
Note that if you are looking for confirmation in CRA's My Account, it can take up to 48 hours to show that your return has been filed.
