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FinancialFebruary 18, 20269 min read

Guide to CRA Form T183: Authorizing Electronic Filing of

By WelcomeAide Team

Person signing a tax authorization form T183 for electronic filing with a tax preparer

What Is CRA Form T183?

Quick tip: download the official T183 first, then fill it while following this guide: Download T183 form (official CRA).

Form T183, officially titled "Information Return for Electronic Filing of an Individual's Income Tax and Benefit Return," is an authorization form used in Canada's tax system. When you hire a tax preparer or accountant to file your tax return electronically using the CRA's EFILE system, they are required by law to have you sign a T183 form before transmitting your return.

For newcomers to Canada who are filing their taxes for the first time, you may encounter this form at a tax preparation office, a Community Volunteer Income Tax Program (CVITP) clinic, or when working with an accountant. Understanding what you're signing is important – this guide explains everything you need to know about Form T183.

Why Does Form T183 Exist?

The T183 serves several important purposes:

  • Authorization: It gives your tax preparer permission to electronically file your return with the CRA on your behalf
  • Accuracy confirmation: By signing, you confirm that you've reviewed the information on your return and that it is correct and complete to the best of your knowledge
  • Legal protection: It protects both you and the tax preparer by creating a documented record of the filing authorization
  • CRA compliance: The CRA requires EFILE service providers to obtain a signed T183 for every return they file electronically

When Do You Need to Sign a T183?

You need to sign a T183 in these situations:

  • A paid tax preparer (accountant, tax service, H&R Block, etc.) is filing your return electronically using EFILE
  • A CVITP volunteer is filing your return electronically at a free tax clinic
  • Any authorized EFILE service provider is transmitting your return to the CRA

You do not need to sign a T183 if you:

  • File your own return using NETFILE (the CRA's online filing service for individuals)
  • File a paper return by mail
  • File through CRA My Account using the Auto-fill feature and your own certified software
Tax preparer reviewing documents with a client at a Canadian tax preparation office

What Information Is on Form T183?

The T183 contains several sections that you should understand before signing:

Part A – Identification

This section includes your personal information:

  • Your full legal name
  • Your Social Insurance Number (SIN)
  • Your date of birth
  • Your address
  • The tax year the return is for

Part B – Certification by the Taxpayer

This is where you sign the form. By signing, you certify that:

  • You have reviewed your return and the information is correct and complete
  • You authorize the EFILE service provider to file your return electronically
  • You understand that you are responsible for the information on your return, even though someone else prepared it

Part C – EFILE Service Provider Information

This section identifies the tax preparer, including their:

  • Name and business name
  • EFILE number (assigned by the CRA)
  • Address and contact information

Part D – Summary of Tax Return Data

This includes key financial figures from your tax return, such as:

  • Total income
  • Net income
  • Taxable income
  • Total payable (tax owing) or refund

These figures help you verify that the return your preparer has completed matches your expectations before authorizing the filing.

Step-by-Step: What Happens When You Sign a T183

Step 1: Your Tax Preparer Completes Your Return

Your tax preparer will gather your tax slips (T4, T5, T5007, etc.), receipts, and other documents to prepare your return using certified tax software.

Step 2: Review Your Return

Before signing anything, your preparer should show you a summary of your return, including your total income, deductions, credits, and whether you're getting a refund or owe tax. Review this carefully.

As a newcomer, don't be shy about asking questions. If something doesn't look right or you don't understand a number, ask your preparer to explain it. Common things to check:

  • Are all your T-slips included?
  • Is your marital status correct?
  • Are your dependents listed?
  • Have eligible credits been claimed (e.g., GST/HST credit, Canada Child Benefit)?
  • Is your immigration date (date you became a resident) correctly entered?

Step 3: Sign the T183

Once you're satisfied that the return is accurate, sign the T183 form. Your signature can be:

  • In person (wet signature): The traditional method of physically signing the form
  • Electronic signature: Since 2020, the CRA allows electronic signatures on the T183 in certain circumstances. Your preparer may ask you to sign electronically using a secure method

Step 4: Your Preparer Files the Return

After obtaining your signed T183, your preparer electronically transmits your return to the CRA using the EFILE system. You should receive a confirmation number that proves your return was received by the CRA.

Step 5: Keep Your Copy

Your preparer must give you a copy of the T183 and a copy of your filed return. Keep these with your tax records for at least six years, as the CRA can request them during that period.

Organized tax records and documents filed in folders

Important Protections for You

The T183 system includes several protections for taxpayers:

  • You are never required to sign a blank T183. The return must be completed before you sign
  • Your preparer must show you the return summary before asking for your signature
  • You can refuse to sign if you're not comfortable with any aspect of the return
  • Your preparer must keep the signed T183 for six years and present it to the CRA upon request
  • EFILE service providers are registered with the CRA and must follow strict rules

Common Questions from Newcomers

"Does signing the T183 mean I can't be held responsible for errors?"

No. Even though someone else prepared your return, you are still legally responsible for the information on it. This is why it's so important to review your return before signing. If there are errors, the CRA will hold you accountable, though you may have recourse against your preparer.

"What if my tax preparer refuses to show me the return before I sign?"

This is a red flag. A legitimate tax preparer will always show you your return before asking you to sign the T183. If a preparer refuses, do not sign and consider finding a different preparer. You can report unethical preparers to the CRA.

"Can someone file my return without my signed T183?"

No. The CRA requires a signed T183 for every electronically filed return submitted through EFILE. If someone files your return without your authorization, this is a serious issue. Contact the CRA immediately at 1-800-959-8281.

"I signed a T183 at a free tax clinic. Is that safe?"

Yes. CVITP clinics are overseen by the CRA, and volunteers are trained and supervised. The T183 signed at a free clinic has the same legal weight as one signed at a paid preparer's office.

EFILE vs. NETFILE: What's the Difference?

These are two different electronic filing systems:

  • EFILE: Used by tax preparers and professionals to file returns on behalf of clients. Requires a signed T183
  • NETFILE: Used by individuals to file their own returns using certified tax software. No T183 needed because you're filing your own return

If you're comfortable with technology and want to save money, you can file your own return using free NETFILE-certified software like Wealthsimple Tax or TurboTax Free. Visit canada.ca/netfile for a list of certified software.

Where to Find Form T183

You generally don't need to download the T183 yourself – your tax preparer will have it. However, if you want to review it in advance, you can find it at:

Resources and Help

The T183 is a straightforward but important form that protects both you and your tax preparer. As a newcomer, always review your return carefully before signing, keep your copies in a safe place, and never hesitate to ask questions. Understanding what you're signing is an important part of managing your finances in Canada.

Download This Form

Before you submit anything, download the latest official file here: Download T183 form (official CRA). Always use the latest version.

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Official external resources

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