I used the software to do the taxes and print them out to mail due to the fact that my CRA account was not working. I didn't mail it yet, and my account is now working properly, is it possible to go back into the software and netfile the return?
Yes. This FAQ tells you how to submit your tax return to CRA using the NETFILE service in TurboTax Online: https://turbotax.community.intuit.ca/community/federal-taxes-netfile/help/in-the-online-edition-of-turbotax-how-do-i-submit-my-tax-return-to-cra-using-the-netfile-service/00/873715