Every year, thousands of Canadian taxpayers waste weeks waiting for CRA responses just because their letter was formatted wrong. Missing one required detail can get your request filed away, rejected, or sent to the bottom of the processing queue.

This is where a properly structured Sample Letter to CRA changes everything. In this guide, you will learn standard CRA formatting rules, get 7 ready-to-adapt letter examples for common situations, and avoid the most common taxpayer mistakes.

What Makes A Proper Sample Letter To CRA Effective?

CRA agents process over 12 million written requests every year. They do not have time to decode unstructured, rambling letters. Using a properly formatted Sample Letter to CRA reduces average processing time by 60% according to independent taxpayer support data.

Every valid CRA letter must include these core non-negotiable elements:

Required Element Purpose
Full Social Insurance Number Instantly links your letter to your official tax file
Notice Reference Number Connects your letter to existing CRA correspondence
1-line clear subject line Routes your submission to the correct department

When drafting your letter, always follow these rules:

  • Submit typed letters only, handwritten submissions are processed 3x slower
  • Never attach unrelated documents or personal photographs
  • Avoid emotional, confrontational or apologetic language
  • Sign and date all physical submissions

Sample Letter to CRA: Requesting Reassessment Of Filed Tax Return

Date: [MM/DD/YYYY]
To: Canada Revenue Agency
Subject: Request for Reassessment - SIN: XXX-XXX-XXX

Dear CRA Agent,
I am writing to request reassessment of my 2023 personal tax return filed April 15 2024. I recently discovered unclaimed medical expenses totaling $1872 that were omitted from my original submission.

Attached are official receipts for all expenses listed. Please adjust my return accordingly and notify me of any updated balance. You may reach me at [phone number] with questions.
Sincerely,
[Full Name]

Sample Letter to CRA: Disagreeing With An Assessment Notice

Date: [MM/DD/YYYY]
To: Canada Revenue Agency
Subject: Dispute of Assessment Notice #123456789 - SIN: XXX-XXX-XXX

Dear CRA Agent,
I am writing to formally disagree with the assessment notice issued to me on [date]. The notice claims unreported employment income that does not belong to me.

Attached is my official T4 slip from my employer confirming my total annual income. Please review this document and correct my file. I request written confirmation of this correction within 30 days.
Regards,
[Full Name]

Sample Letter to CRA: Requesting Extension For Tax Filing Deadline

Date: [MM/DD/YYYY]
To: Canada Revenue Agency
Subject: Filing Extension Request 2024 Tax Year - SIN: XXX-XXX-XXX

Dear CRA Agent,
I am writing to request a 60 day extension to file my 2023 personal tax return. I was out of the country for medical treatment and cannot obtain required documents before the April 30 deadline.

Attached is proof of my hospital admission dates. I confirm I will file my full return by June 30 2024. Thank you for your consideration.
Sincerely,
[Full Name]

Sample Letter to CRA: Reporting A Lost Benefit Cheque

Date: [MM/DD/YYYY]
To: Canada Revenue Agency
Subject: Lost GST/HST Benefit Cheque - SIN: XXX-XXX-XXX

Dear CRA Agent,
I am reporting that my GST/HST benefit cheque issued March 5 2024 for $421 was lost in the mail. I have not cashed or deposited this cheque.

Please cancel the original cheque and reissue a new payment to my registered mailing address. Please notify me once the new cheque has been sent.
Thank you,
[Full Name]

Sample Letter to CRA: Requesting Waiving Of Late Filing Penalties

Date: [MM/DD/YYYY]
To: Canada Revenue Agency
Subject: Penalty Waiver Request - Account #987654321

Dear CRA Agent,
I am writing to request cancellation of the $287 late filing penalty applied to my 2023 tax return. I filed late following the unexpected death of my immediate family member.

Attached is a copy of the death certificate. This is my first late filing in 18 years as a taxpayer. Please waive this penalty as permitted under CRA guidelines.
Regards,
[Full Name]

Sample Letter to CRA: Updating Personal Contact Information

Date: [MM/DD/YYYY]
To: Canada Revenue Agency
Subject: Update Mailing Address And Phone Number - SIN: XXX-XXX-XXX

Dear CRA Agent,
I am writing to notify you of my change of address effective May 1 2024. My new residential and mailing address is: [Full New Street Address, City, Postal Code].

My new primary contact number is [phone number]. Please update all records associated with my SIN immediately. Thank you for your assistance.
Sincerely,
[Full Name]

Sample Letter to CRA: Requesting Copy Of Previous Year Tax Documents

Date: [MM/DD/YYYY]
To: Canada Revenue Agency
Subject: Request For 2021 Notice Of Assessment - SIN: XXX-XXX-XXX

Dear CRA Agent,
I am writing to request an official copy of my 2021 Notice of Assessment. I require this document for a mortgage application and have misplaced my original copy.

Please mail the document to my registered address on file, or make it available via my CRA My Account portal. Thank you for your prompt assistance.
Regards,
[Full Name]

Frequently Asked Questions about Sample Letter to Cra

Can I email my letter to the CRA?

No, the CRA does not accept general letters via regular public email. All submissions must be sent through the secure My Account portal or via registered Canada Post mail. This policy exists to protect taxpayer personal information.

How long does the CRA take to reply to letters?

Standard processing time for properly formatted letters is 4-6 weeks. Letters with missing information or incorrect formatting can take 12 weeks or longer. You can check status through your CRA My Account at any time.

Do I need a lawyer to write a letter to CRA?

No, most common taxpayer requests do not require legal representation. You can use the sample letters on this page for all standard situations. Only hire legal help for complex tax disputes or audit matters.

Should I send original receipts with my letter?

Never send original official documents to the CRA. Only send clear, legible photocopies or scanned digital copies. Keep all original documents for your personal records for a minimum of 6 years.

Can I use the same letter format for business taxes?

These samples are designed for personal taxpayer use. Business tax letters require additional information including business number, legal business name and authorized signatory details. Use separate business specific templates for corporate requests.

What if I don't have a notice reference number?

If you are writing about a new issue with no existing CRA notice, state clearly that this is a new request in your subject line. Always include your full SIN so agents can locate your file immediately.

Can I submit multiple requests in one letter?

You should only submit one request per letter. Sending multiple unrelated requests in a single submission will result in much longer processing times. Send separate letters for each separate issue.

Do I need to sign digital letters submitted online?

Letters submitted through the CRA secure portal do not require a handwritten signature. You will authenticate your identity when you log into your account. Physical mail submissions must always include your handwritten signature.

Every letter example on this page follows official CRA formatting requirements and avoids the common mistakes that delay most taxpayer requests. You can adapt any of these samples for your exact situation by replacing the placeholder information with your personal details.

Save this page for future reference, and always double check your SIN, reference numbers and attached documents before submitting. If you have a unique situation not covered here, start with the base structure from any sample letter and add only the relevant facts for your request.