Corporation Internet Filing
Frequently Asked Questions
What is Corporation Internet Filing?
Corporation Internet Filing is a means to electronically transmit the information contained in a corporate
tax return directly to the CRA via the Internet.
Are there eligibility criteria?
With the exception of insurance companies, all corporations can use Corporation Internet Filing to file
their income tax returns.
Visit the CRA website
for more information on returns that can be filed electronically with the CRA.
What if I am already registered for EFILE?
The CIF system is partnered with EFILE to provide "one-stop" registration for tax professionals who file both
individual and corporation income tax returns electronically on behalf of their clients. If you are a tax
professional who is already registered to EFILE individual income tax returns, you are automatically registered
to transmit corporation income tax returns, and will use the same EFILE login information.
Can the corporation transmit its own income tax return?
Yes, provided they have a Web Access Code. They can contact the CRA's Corporation Internet Filing Help Desk at
1-800-959-2803 to make a request. The code will be mailed to them within a few days.
Is the CIF client authorization process different from the T1 EFILE On-Line/EFILE authorization process?
No, it is quite similar. For personal tax return purposes, the client must sign Form T183. In the case of corporate
returns, the signing officer must sign Form T183CORP.
What do I need to use the CIF service?
You will need an Internet connection, the Cantax Corporation Internet Filing module and a browser that supports
Transport Layer Security (TLS). The CRA recommends upgrading to a browser that supports TLS 1.2. You must
also ensure that cookies are enabled in your browser settings.
What are the costs involved?
CIF is included in select Cantax T2 subscriptions. See our order information page for details.