If this is your first time filing a return, you’ll probably not be able to NETFILE, as the CRA doesn’t have your information in their files yet. Instead, you'll need to print out and mail your return.
To do this, go to the Filing Hub page (File>Filing Hub in the left side menu), and click the button that says "Print & Mail Your Return(s)". Click that to get a copy that you can mail to the CRA.
If you have TurboTax Live Assist & Review, here is how to talk to a Tax Expert: https://turbotax.community.intuit.ca/community/navigating-turbotax/help/i-m-using-turbotax-live-assist-review-how-do-i-talk-to-a-tax-expert/00/873764