Maintain your business

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https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/business-registration/maintain-business.html

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Maintain your business

It is important to keep your business information complete and up to date with the Canada Revenue Agency (CRA). You must notify the CRA about certain changes you make to your business.

On this page

Access your business information online

To access your business information online, the CRA must have your Social Insurance Number (SIN) on file, and your business number (BN) must be added to your CRA account. Once set up, you can view and manage your program accounts, and authorize representatives using My Business Account in your CRA account.

Security measures for accessing business information

Only owners, partners, or directors who have their name and SIN on file with the CRA have the authority to:

  • Access the business information
  • Make changes to the business
  • Add representatives
  • Access My Business Account


How to add your SIN to your CRA business account

If the SIN of an owner, partner, or director has not been provided to the CRA before, you can add it to your BN in one of the following ways:

Add your SIN online

An owner, partner, or director can add their SIN online when they add their BN to their CRA account.


Note


To use this service, your business must have a GST/HST account or a corporate income tax account. You must also have a processed GST/HST return or processed corporate income tax return for that account, because you'll be asked to enter information from that return.

For steps on how to add your SIN online, go to How to access My Business Account.

Submit a request through Represent a Client

A representative can upload a request using the Submit documents service in the Represent a Client portal of their CRA account.

The request must be signed by the owner, partner, or director asking the CRA to add their SIN to the business account.

Fax your request

An owner, partner, director, or representative can fax a signed request to the business's tax centre:

  • Prince Edward Island Tax Centre: 1-833-724-7237
  • Sudbury Tax Centre: 1-855-276-1529

Mail your request

An owner, partner, director, or representative can mail a signed request to the business's tax centre.

For addresses, go to Find a CRA address.


Update your business information

Depending on the type of change, you may be able to update the information in to your CRA account or you may have to contact the CRA.

Growing your business

If your business expands, there may be new reporting requirements and you may have to provide new information to the CRA.

Changes to business operations

If there are changes to your business operations, you must notify the CRA to avoid tax implications that may affect your program accounts.


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2026-04-01

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