Here is our TurboTax FAQ link to guide you with using the NETFILE service.
In the online edition of TurboTax, how do I submit my tax return to CRA using the NETFILE service?
For more information please see this Canada Revenue Agency (CRA) link: File your taxes online: NETFILE eligibility
If additional help is required, we believe one of our telephone support agents would be able to help you further as they can view your screen, if necessary, to guide you. To contact us please follow this link: Contact Us form. When asked if you wish to receive an email, say NO then say "speak to a representative" and hold the line.
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