Here is an FAQ that talks about NETFILE eligibility:
https://turbotax.community.intuit.ca/replies/2647669
If you still feel that you are eligible, please go
through the My Info part of the review again and make sure all the questions
are answered, and that they are answered correctly. Ex: On the Contact Info
page, make sure you have answered NO to the question “Is your mailing address
outside Canada?”.
Also, if you didn’t do so before, go through the
Review before using NETFILE.
If you are still getting an error message, please
let us know what the exact error message is so that we can assist you in
resolving the issue. You can also contact our phone support: https://turbotax.community.intuit.ca/replies/3152013