Need an access code?

You can change your access code to a number of your choice by using GST/HST Access Code Online.

GST/HST Access Code Online

GST/HST Access Code Online lets you change your access code to a number of your choice. Your new access code can be used to file all future returns. Your original access code will no longer be valid.

To change your access code, you will need to enter your business number and your choice of the following information from a previously filed return:


The CRA has taken all reasonable steps to ensure the security of this Web site. We have used sophisticated encryption technology and incorporated other procedures to protect your personal information at all times. However, the Internet is a public network and there is the remote possibility of data security violations. In the event of such occurrences, the CRA is not responsible for any damages you may experience as a result.

Please note that your secure session will expire after 35 minutes of inactivity.

Business enquiries

If you are not able to change your access code by using GST/HST Access Code Online, call us at 1-800-959-5525 and we will change it for you. If you are calling from outside Canada and the United States, call us collect at 613-940-8497.

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