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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.


Employment Insurance (EI), Canada Pension Plan (CPP), and Old Age Security (OAS) use Personal Access Codes (PAC) to safeguard your accounts and to help verify your identity.

Neither GST/HST Access Code Online nor our 1-800 code can change your access code. We will help you if you need to change it anyway. The company has a collect number 613-940-1885 if the call comes from outside Canada or the United States.

In an emergency, an employer must request a Web Access Code from the CRA website. Please visit this website for an easy way to request an Emergency Web Access Code. To file, you need to include your user name and identification number, the last name of the return, and financial information from the previous return.

What are Web access codes?? User IDs and passwords for a particular website are called Web access codes. You will need to enter two digits and four numbers to access your Web site. Due to its sensitivity, it must be handled by a special agent.

Can I find my NAC on there I find my NAC? On your Notice of Assessment (NOA) for the previous tax year, you’ll find a unique NAC code, which you must use for the tax year that just ended. You can access your NAC by selecting the Date issued on the Right Side of your paper NOA.

To gain full access to your CRA account, you will need to apply through mail or email with your security code. To verify your identity, call the CRA by email.

  • You are required to submit two pieces of social insurance data as follows.
  • For your date of birth, and your place of residence.
  • The amount you spent on your tax return the past couple of years on line 150.

There are two ways of filing your GST / HST.  You can either fill out the form or mail in your details to the CRA.  Or two you can file for your GST netfile and HST netfile online.  The best way to file for your GST netfile or HST is to use the netfile service the CRA provides.  This is the fastest and easiest way for filing your return.  You may go to GST / HST Netfile and begin your process to file your return. 

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.

Salman Rundhawa
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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