• Knowledgebase
• Windows
• Canada
• Getting Started
• Enrollment and Requirements

Search Our Knowledgebase (Windows; Canada)

• Log into your account at https://efileca.aatrix.com

• If you are changing the preparer contact, navigate to the "Home" Tab. Click "Preparer Contact Information" on the right side. 

• If you are only changing a Company Contact, select the "Companies" tab.
  
  Note: Changing the company contact or company information will require a new signature authorization form. Please print, sign, and fax the signature authorization form to update our records.

• The "Companies" tab will also include the following options:

• Add additional companies

• Add program accounts

• Update taxpayer information

• Review Filing States

• Enter usernames, passwords or pins that you have receive from CRA

• Once you have completed updating the information, click on the "Save" button to update. 

Related Pages:

eFile Authorization Form

Read information on activating authorization for eFilings.

Additional Companies

Learn more about other requirements for eFiling.

Username and Password Recovery

Read on for how to recover your username and/or password.

Additional Agency Requirements

Learn more about other requirements for eFiling.