When CRA issues a Notice of Assessment or Reassessment that you believe is incorrect, you have a legal right to dispute it through the formal CRA tax objection process. A Notice of Objection initiates CRA’s internal review by the Appeals Division — separate from the tax auditor who issued the reassessment. If the Appeals Division upholds the assessment, you can further appeal to the Tax Court of Canada. Pathak Professional Corporation in Mississauga represents Ontario individuals and businesses throughout the CRA objection and appeal process. Call 437-872-7399.

What Is a CRA Notice of Objection?

A Notice of Objection is a formal written dispute filed with CRA’s Appeals Division challenging a:

• Notice of Assessment (initial assessment of your return)
• Notice of Reassessment (reassessment after an audit or review)
• Notice of Determination (for loss determinations)
• Penalty assessment
• GST/HST assessment

Filing a Notice of Objection does NOT mean you refuse to pay — in most cases, CRA requires (or accepts) payment of the disputed amount during the objection period to stop interest from accruing, and will refund it if you win. However, in some cases CRA will collect on the full assessment while the objection is pending.

CRA Objection Deadline — The 90-Day Rule

You have 90 days from the date on the Notice of Assessment or Reassessment to file your Notice of Objection with CRA. This is a strict deadline:

• For personal T1 objections: 90 days from the date of the notice, OR one year from the T1 filing deadline for that year (whichever is later)
• For corporate T2 objections: 90 days from the date of the notice
• For GST/HST objections: 90 days from the date of the notice

Extension of time: If you miss the 90-day deadline, you can apply for an extension of time to object — but you must apply within ONE YEAR after the 90-day period expires. Extensions are not automatically granted; you must show that you had a bona fide intention to object within the 90-day period, and that it would be just and equitable to grant the extension.

Never ignore a reassessment notice. If you do nothing, the assessment becomes final and you lose your legal right to dispute it. Pathak Professional Corporation files objections for Mississauga clients even when the outcome is uncertain — preserving the right to appeal is always worth the effort. Call 437-872-7399.

How to File a CRA Notice of Objection

Step 1: Understand Why You Were Reassessed

Before filing, obtain and review CRA’s reasons for the reassessment. Request the auditor’s working papers and any reports produced during the audit if you don’t already have them. Identify: which items were disallowed, the CRA’s legal or factual basis for disallowing them, and whether you have documentation to contradict CRA’s position.

Step 2: Prepare the Objection Package

Prepare:

• A clear written statement of the facts you rely upon
• The specific reasons you are objecting (legal arguments and factual counter-evidence)
• Copies of all supporting documentation (invoices, contracts, receipts, bank statements, expert opinions)
• Any legal authorities (case law, CRA interpretation bulletins, income tax folios) that support your position

The quality of the objection package often determines the outcome. A well-organized, fact-specific objection with strong documentation is far more likely to succeed than a general complaint. Our CRA audit representation team prepares comprehensive objection packages that anticipate CRA Appeals’ counter-arguments.

Step 3: File Using CRA My Account or Form T400A

File the Notice of Objection through CRA My Account (for individuals) or CRA My Business Account (for corporations), or by mailing Form T400A (Objection — Income Tax Act) to the designated CRA Appeals intake office for your province. Ontario taxpayers file objections with the:

Chief of Appeals, Appeals Intake Centre
CRA, Sudbury Tax Centre
Post Office Box 20000, Station A
Sudbury, ON P3A 5C1

Step 4: CRA Appeals Reviews the File

CRA’s Appeals Division assigns your file to an Appeals Officer who is independent of the original auditor. The Appeals Officer reviews the file, may request additional information, and may meet with you or your representative. The officer is empowered to settle the dispute — agreeing with your position, partially allowing the objection, or upholding the original assessment.

Step 5: Accept the Decision or Appeal to Tax Court

If CRA’s Appeals Division issues a Notice of Confirmation (upholding the original assessment) or a new Notice of Reassessment that you still disagree with, you have 90 days to appeal to the Tax Court of Canada.

Tax Court of Canada — Two Procedures

Common Grounds for Successful CRA Objections

The strongest CRA objections are based on one or more of these grounds:

• Factual error: CRA assumed facts that are incorrect and you have documentation to disprove them (income misclassified, expense clearly business-related)
• Legal misapplication: CRA applied the wrong section of the Income Tax Act, missed an applicable deduction, or misinterpreted a treaty provision
• Procedure error: CRA reassessed outside its normal reassessment period without the required finding of misrepresentation
• Missing documentation accepted: You now have the documentation you lacked during the audit (retroactive documentation is weaker but still accepted in some circumstances)
• Penalty challenge: The underlying tax may be correct but the gross negligence or other penalty should not apply because the error was honest and not willful

Practical Tips: How to Improve Your Objection’s Chances

1. File on time or apply for extension immediately — a late or missed objection is fatal
2. Get professional representation — a CPA or tax lawyer who knows CRA’s approach gives you a significant advantage over self-represented objections
3. Be complete and specific — vague objections (“I disagree with the amount”) are treated less seriously than specific factual and legal arguments
4. Provide all supporting documentation upfront — don’t hold back documentation hoping to use it at Tax Court; get it in front of the Appeals Officer
5. Understand CRA’s legal position — before filing, research whether any Tax Court cases or CRA technical bulletins support your position
6. Consider partial settlement — many objections are resolved through negotiated partial settlements at the Appeals stage, which saves the cost and uncertainty of Tax Court

Frequently Asked Questions

Do I have to pay the reassessed amount while my objection is pending?

CRA can collect on an assessment even during an objection — but in practice, for income tax (not GST/HST), CRA’s standard policy is to defer collection on disputed amounts while an objection or Tax Court appeal is pending, provided you have not been given a demand for immediate payment or a Jeopardy Order. However, interest continues to accrue on any unpaid balance. For GST/HST assessments, CRA typically collects immediately — the objection filing does not automatically stay collection. For large disputed assessments, you can apply to the Tax Court for a collection restriction while the appeal is pending. Pathak Professional Corporation advises Mississauga clients on managing cash flow during the objection process. Call 437-872-7399.

How long does the CRA objection process take?

CRA’s Appeals Division is chronically understaffed and timelines are long. As of 2024, CRA Appeals’ average processing time for income tax objections is 18–30 months for complex cases and 9–18 months for simpler ones. GST/HST objections are typically processed faster. During this waiting period, your CPA representative should proactively follow up with the Appeals Officer and be prepared to respond quickly when the file becomes active. For disputes that must be resolved urgently (cash flow crisis, business financing requirements), Pathak CPA explores early resolution options with CRA Appeals. Do not assume silence means the objection is succeeding — it often means the file is simply in queue.

Can I file an objection myself without a CPA or lawyer?

You can — CRA does not require professional representation for a Notice of Objection. However, the success rate for self-represented objections is significantly lower than represented ones, particularly for complex audits involving business income, employment expense deductions, or large capital transactions. CRA’s Appeals Officers are trained tax professionals who know the income tax law thoroughly. Without a CPA or tax lawyer in your corner, you are at a significant knowledge disadvantage. For straightforward disputes (a single misunderstood deduction with clear documentation), self-representation can work. For anything involving legal interpretation, reconstruction of income, or large amounts, professional representation is strongly recommended.

What if CRA’s Appeals Division upholds the full assessment?

You have 90 days from CRA’s Notice of Confirmation to file an appeal with the Tax Court of Canada. This appeal is entirely independent of CRA and is decided by a Tax Court judge. The Tax Court is not biased toward CRA — many cases are won at this level that were lost at CRA Appeals. However, Tax Court litigation is expensive, time-consuming (typically 1–3 years for general procedure), and uncertain in outcome. A careful cost-benefit analysis should be conducted before proceeding. For cases where the disputed tax exceeds the cost of litigation and you have strong legal or factual grounds, Tax Court appeal is absolutely worth pursuing. Pathak CPA works with specialized tax litigation counsel for Tax Court proceedings.

CRA Objection and Tax Appeal Services in Mississauga

Pathak Professional Corporation provides CRA audit and objection services for Ontario individuals and businesses: Notice of Objection preparation and filing, CRA Appeals representation, Tax Court of Canada appeal support, GST/HST objection services, and penalty challenge applications.

If you have received a CRA reassessment you believe is wrong, contact us immediately — the 90-day deadline is strict. Call 437-872-7399 or email info@pathakcpa.ca. 48 Village Centre Place, Mississauga, Ontario L4Z 1V9.