You were charged the cost of using our software to prepare your tax return. Filing your return using the CRA's NETFILE service is free, however, not everyone qualifies to use NETFILE. For those who can't, there is still the option of Printing & Mailing your return.
You can review NETFILE eligibility rules here: https://www.canada.ca/en/revenue-agency/services/e-services/e-services-individuals/netfile-overview/eligibility.html