When you filed your tax return using TurboTax, you should have received a NetFile Confirmation Number. If you received this confirmation number and CRA still says they have not received your tax return, you need to contact them. 1-800-959-8281.
The information below tells you how to check for your Netfile Confirmation Number, as well as the status of your return with CRA.
https://turbotax.community.intuit.ca/replies/3364269