You can make changes after you have filed your tax return through the Canada Revenue Agency (CRA) or through ReFILE. This FAQ has more information: https://turbotax.community.intuit.ca/community/tax-return-amendment/help/i-have-filed-my-tax-return-can-i-still-make-changes/00/873608
Thanks for the quick reply.
Should we complete the wife's return or wait until the NOA comes back and only then file hers together with my info as a joint return?
Unlike in some other countries, Canada doesn't have joint filing for spouses/partners. TurboTax just allows you to prepare returns together with your spouse to make it easier to claim credits and maximize deductions. Also, since your return has already been NETFILEd, you would have to use your existing return if you want to ReFile.
You can create a individual return for your wife and file it. Then once you have your Notice Of Assessment, you can ReFile your return.