If you have run out of returns that
were included when you bought TurboTax, you can add more: https://turbotax.community.intuit.ca/replies/2647733
If you have reached the maximum
of 20 returns that can be NETFILED, this is a limit that is set by the CRA and
can’t be bypassed. You can paper file any additional returns. You may also
consider getting an EFILE account and using Profile software instead of
TurboTax: http://profile.intuit.ca/professional-tax-software/index.jsp