NETFILE is a secure transmission service that allows you to file your tax return with the Canada Revenue Agency over the Internet. In order to use NETFILE you must prepare your tax return using tax software, either installed on your computer or through a web application.
You will also need a four-digit access code, provided by the Canada Revenue Agency. If you don’t have an access code here’s how you can get one.
If you are filing a tax return for the very first time, you will not be able to send it through NETFILE. Try going to an EFILE service provider or print and mail your tax return.