No, there are limits - As per CRA
Limit of 20 returns
NETFILE is an electronic filing service that taxpayers can use to file their own individual income tax and benefit return with the CRA. To protect the integrity of this service, the CRA has set a limit of 20 returns per computer that can be prepared with NETFILE-certified tax preparation software each tax year. The limit may help prevent some tax preparation service providers from using NETFILE. Software developers must respect this limit to be certified for NETFILE.
The CRA has determined that a limit of 20 returns, whether printed or filed using NETFILE, is appropriate and sufficient for a NETFILE software product. This will allow even a large family to share one software product to prepare and file their tax returns.
