If you have received a NETFILE confirmation number, your income tax return was successfully transmitted to the Canada Revenue Agency.  In this case, you will need to ask the CRA to run a trace using your confirmation number.  The CRA can be reached at 1 800 959 8281.

Please see the following FAQ for instructions on how to NETFILE using TurboTax Online:

https://turbotax.community.intuit.ca/replies/3210262