Obtaining New Access Code to NETFILE GST/HST Return

Currently, when looking at your Notice of Assessment, you will see an 8-character, alphanumeric code previously referred to as your Internet Access Code (IAC). Starting in 2020, this code is now being referred to as the NETFILE Access Code (NAC).

If you have lost or never received an access code to NETFILE GST/HST return, you can now get a new code by using GST/HST Access Code Online. You can also change your access code to a number of your choice by using GST/HST Access Code Online.

What is it NETFILE GST/HST Access Code?

The new NAC is intended to be used as an extra level of security to authenticate an individual during the NETFILE transmission process. This replaces having to provide the CRA with a specific line number of a previous year’s tax return when calling into the CRA to authenticate your account.

Where do I find it?

This alphanumeric code can be found on your paper Notice of Assessment (NOA) top right corner under the “Notice Details” section ( see image below) or online in your “MyAccount” next to “Access Code”. This code is unique to each individual.


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If you cannot locate your NAC on the paper copy of your NOA or online in your “My Account”, you can call the CRA, and answer a few authentication questions before they provide you with the information requested.

How to Obtain New Access Code to NETFILE GST/HST Return?

Canada Revenue Agency (CRA) has added this service to create a new access code to replace the one that was lost or that you didn’t receive in the mail.

To obtain a new access code you will need to enter the following information:

  1. The Business Number, and
  2. The reporting period of the current return.

CRA will verify the above information by obtaining one of the following:

  1. The reporting period and line 109 (i.e. net tax) from a previously filed return; or
  2. The reporting period and confirmation number from a return filed using GST/HST NETFILE, TELEFILE, or Internet File Transfer.

Please note that the session is secured and will expire after 15 minutes of inactivity.

To access the CRA service simply follow the link.


First-time filers and prior years' returns will be excluded from this code.

Note: You will successfully NETFILE your tax return when you receive a confirmation number at the end of the process. If you do not receive a confirmation number, your tax return has not been transmitted to the CRA through NETFILE.


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Note that you will need the form they mailed to you as it has valuable information to help you file.  You will need your business number, dates that you need to file, and most importantly your access code. 

If you need any further information, contact the Filing Taxes team of professional accountants today at 416-479-8532. Schedule an NTR engagement appointment with us and take the first step towards proper management of your finances.

Disclaimer: The information provided on this page is intended to provide general information. The information does not consider your personal situation and is not intended to be used without consultation from accounting and financial professionals. Salman Rundhawa and Filing Taxes will not be held liable for any problems that arise from the usage of the information provided on this page.

Written By:
Salman Rundhawa
Salman Rundhawa is the founder of Filing Taxes. Salman provides valuable tax planning, accounting, and income tax preparation services in Toronto, Mississauga, Oakville, and Hamilton.

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