When a CRA audit, Alberta notice, or review letter arrives in your mailbox, panic is usually the first reaction, and that’s completely understandable. In most cases, however, it’s also unnecessary. The CRA processed roughly 3 million tax returns through its income tax review programs in 2024, and the majority of those cases were resolved without any additional tax owing.
A review letter is not an audit. It is the CRA asking you to support a specific claim with the right documentation — nothing more. For incorporated small business owners in Calgary and Edmonton, that distinction is worth understanding clearly before you respond.
Most Alberta business owners only discover this after it has already cost them: Individuals are generally 3 years, corporations 4 years — but “Section 152” alone is not the full authority explanation. That difference is more significant than it appears.
Ignore the letter, send a careless response, or miss the deadline, and what began as a routine document request can escalate into a full audit reaching back further than you’d want to contemplate.
Work through this guide, and you’ll know exactly what the letter means, what your first 30 days should look like, and when it’s time to bring in a Calgary accountant for CRA audit support.
QUICK RESOURCE: Not sure which documents CRA is likely to request? Book a free 15-minute call with intaX Calgary, and we’ll walk through your letter with you, no charge, no obligation. Visit intax.ca
CRA Review Letter vs. CRA Audit Alberta: They Are Not the Same Thing
A CRA review letter asks you to verify a specific claim on your return. A full CRA audit examines your books and records across multiple years and carries far greater financial risk.
According to the CRA’s own guidance, a review is a routine check to confirm accuracy. A full audit, which the CRA completed on close to 69,000 files in the 2023–24 fiscal year, up from 62,660 the year before (CRA Departmental Results Report, 2024–25), is a fundamentally different process.
The three most common types of CRA correspondence for Alberta small business owners:
- CRA Review Letter (Request for Information): Asks for receipts or slips to verify a specific line item. Most resolve in 2–6 weeks with no changes to your return.
- Notice of Reassessment: The CRA has already changed your return. You have 90 days to file a Notice of Objection under Section 165(1) of the Income Tax Act.
- Full Audit Notification: A broader examination of your books, often triggered by a pattern of discrepancies or an unsatisfactory response to a prior review.
In the intaX Calgary practice, the business owners who face the most serious outcomes are rarely the ones who made errors. They are the ones who ignored the original review letter. The CRA does not follow up to remind you.
Next: exactly what triggers a CRA review and why Alberta business owners appear more frequently than they expect.
Why Your Return Was Flagged for a CRA Audit or Review
The CRA catches flagged returns through a combination of automated risk-scoring and hands-on analyst review. Certain triggers show up far more often among incorporated businesses in Alberta than most owners would expect.
Audit in Alberta:
- Home office and vehicle expense claims above the norm for your industry and income level
- Mismatched slips: A T4, T5, or T3 the CRA received from your employer or bank does not match your filed return
- A new deduction claimed for the first time, especially for incorporation-related expenses in the first year or two of a corporation.
- Significant change in marital status, province, or income between filing years
- GST/HST returns showing expenses inconsistent with revenue (a priority audit area in 2024–25, per CRA Departmental Results)
- Random selection is still common in mass-review programs where the CRA checks compliance trends across large groups of filers.
The CRA’s Matching Program runs from September through March each year. Miss a T5 from a bank account on your return, and a review letter can show up eight to twelve months after you filed taxes. cawell past the point where most people have given second thought to last year’s taxes (GetSmarterAboutMoney.ca, 2024).
Understanding why you were flagged shapes how you respond. The next section gives you the exact steps.
Your First 30 Days: How to Respond to a CRA Review Letter
The 30-day deadline on a CRA review letter is real. Miss it, and CRA will reassess your return based on whatever information it already has, and that reassessment will not be in your favour.
According to the CRA’s official guidance, failing to respond within the stated deadline triggers an automatic adjustment (canada.ca/en/revenue-agency/services/tax/individuals). Generally, the CRA will not chase you for your receipts.
What to do in order:
- Take your time with the letter. Figure out exactly what’s being reviewed, which tax year it covers, and when your response is due. That deadline goes in your calendar before anything else happens.
- From there, pull only the documents the CRA specifically requested for tax purposes. Sending unrelated records is one of the easiest ways to open up new lines of inquiry you didn’t invite. If the letter is about a home office claim, send your lease, utility bills, and a business-use calculation. Your full financials have no place in that response.
- Submit everything through CRA My Business Account using the Submit Documents service. You’ll receive a confirmation number and a full record of your submission — fast, traceable, and properly documented. Mailing physical copies slows the process down and leaves you with no verifiable proof that anything was received.
- If you cannot meet the deadline, call before it passes. The number is on the letter. The CRA will grant extensions to cooperative filers. Going silent is the worst option available.
- Keep copies of everything submitted. CRA guidance requires retaining all tax records for a minimum of six years.
After submitting, the typical resolution time is 2–6 weeks (CJCPA, 2025). The next question: what if the CRA disagrees with your response?
If You Receive a Notice of Reassessment: Your Rights as an Alberta Taxpayer
A Notice of Reassessment means the CRA has made changes to your tax return. But it isn’t the final word. Under Section 165(1) of the Income Tax Act, you have exactly 90 days to file a formal Notice of Objection. That clock starts from the date printed on the notice, not the day it shows up in your mailbox, or the day you get around to opening it.
Filing a Notice of Objection does two important things at once. It moves your case away from the original auditor and hands it to the CRA Appeals Division in tax.CAA has a separate group tasked with reviewing disputes impartially. And while that objection is active, the CRA is required to pause any collection activity on the amount in dispute.
The objection process step by step:
- File Form T400A (Notice of Objection – Income Tax Act) or submit through My Business Account within 90 days of your reassessment date.
- Include your reasons and supporting documents. Explain exactly where the CRA’s calculation is wrong and attach your evidence.
- An Appeals Officer is assigned. They were not involved in the original audit and reviewed your file independently, contacting you or your representative to discuss.
- Resolution or escalation. If the objection is denied, you have a further 90 days to appeal to the Tax Court of Canada.
Missing the 90-day objection deadline doesn’t necessarily end your options — but the window that follows is just as strict. An extension is available, provided you apply within one year of the original deadline. Not a day later. Let the full 15 months pass, and the reassessment is locked in permanently. No appeals, no corrections, no recourse through the CRA or the courts — even if the number they landed on was completely wrong. Once that final date passes, there is no way back in.
Do not pay the disputed amount simply to make it go away. If you win the objection, CRA refunds the overpayment with interest, but only if you filed an objection in the first place.
Documents You Need to Survive a CRA Audit or Review in Alberta
Whether your letter is a routine review or a full CRA audit, the outcome depends almost entirely on your documentation. No receipts, no deduction. CRA is not required to take your word for a claimed expense.
The CRA requires supporting records for at least six years from the end of the tax year they relate to (canada.ca). For Alberta corporations, that is six years from the tax year-end, not the filing date, a distinction that matters when early-incorporation expenses come under review.
Documents most commonly requested in CRA reviews of Alberta incorporated businesses:
- Home office expenses call for lease or mortgage statements, utility bills, property tax notices, and a floor-plan calculation that shows what percentage of the space is used for business.
- Vehicle expenses require a contemporaneous mileage logbook for tax. The CRA won’t accept one that’s been reconstructed after the fact, including fuel receipts and your insurance and registration documents.
- For business meals and entertainment, you’ll need receipts that show the restaurant name, the amount, the date, the business purpose, and the name of whoever you were with.
- Contractor or subcontractor payments: Signed contracts, T4A slips if applicable, and proof of payment (e-transfer records or canceled cheques)
- GST/HST input tax credits: Vendor invoices showing the supplier’s GST registration number, a missing registration number is the single most common reason ITC claims are denied
A practitioner-level detail the top-ranking articles do not cover: the CRA’s automated matching system cross-references GST registration numbers with its own vendor database. If a vendor closed their GST account or never had one, and you claimed ITCs on their invoices, that line item will almost certainly be flagged.
The next section covers what happens when CRA’s formal audit powers are triggered and how the 2025 and 2026 changes made those powers significantly broader.
CRA Audit Powers in 2026: What Budget 2024 Changed for Alberta Businesses
Budget 2024 gave the CRA two new enforcement tools that came into force in late 2024 and 2025. Alberta business owners should understand them before a routine review escalates to something more serious.
The two key changes (CRA audit changes 2025–2026, JWC & Associates CGA, 2026):
- Notices of Non-Compliance (NNC): If you fail to provide documents during an audit, the CRA can now assess a penalty of $50 per day up to a maximum of $25,000 for each day the non-compliance continues. The normal reassessment period for affected years is also extended while the NNC is outstanding.
- Compliance Order Penalties: If the CRA obtains a Federal Court compliance order and you still fail to comply, a further penalty of 10% of aggregate tax payable (for years where tax owed exceeds $50,000) can be assessed on top of all other penalties and interest.
There’s also a meaningful change on the relief side that’s worth knowing about. The Voluntary Disclosures Program was overhauled on October 1, 2025. Under the old rules, receiving any communication from the CRA disqualified you from the program entirely. That’s no longer the case. Under the updated framework, prompted applicants in tax Capeoplee who have already heard from the CRA. Can now qualify, with 25% interest relief and up to 100% penalty relief available.
Put simply, if you’ve gotten an education letter about unreported income, coming forward now could still get you meaningful relief. Wait until a full audit is formally opened, and that opportunity is gone.
When to Call an Accountant for CRA Audit Help in Calgary or Edmonton
Straightforward review letter, organized records in tax. You can likely handle it yourself. But not every situation is that clean, and when the complexity starts to climb, having a Calgary or Edmonton accountant in your corner before you respond is worth the call.
Worth keeping in mind: the 2025 Auditor General Report on CRA contact centers found that CRA phone agents answered individual tax questions correctly only 17% of the time, and got business tax questions right just 54% of the time. Calling the CRA for guidance on anything beyond a basic question carries more risk than most people realize.
Call a tax accountant before responding if:
- If the letter touches business expenses, capital gains, or GST/HST, get professional help before responding to tax. These are the categories that tend to produce the most complicated reviews and the largest reassessment amounts.
- The same applies if the reassessment exceeds $5,000 or spans more than one tax year.
- You have received more than one review in three years, a pattern that raises the probability of a formal audit
- You are considering the Voluntary Disclosures Program VDP eligibility and relief calculations, which require professional assessment
- You disagree with a Notice of Reassessment and are considering a Notice of Objection
intaX experience: Business owners who engaged professional help at the Notice of Objection stage rather than after an unfavorable Appeals decision consistently achieved better outcomes. At the objection stage, an independent CRA Appeals Officer reviews the file. With well-organized documentation and a clear argument, partial or full reversals are a realistic outcome.
The intaX Calgary team works with incorporated small businesses across Calgary and Edmonton on CRA reassessment support and corporate tax compliance. An initial conversation costs nothing.
BOOK YOUR FREE CALL: Book a free 20-minute call with intaX. Bring your CRA letter, and we will tell you exactly what you are dealing with, what documents you need, and whether professional representation makes sense for your situation. No obligation. Visit intax.ca
The Bottom Line for Alberta Incorporated Business Owners
A CRA review letter is not an audit, and for most people, it never becomes one. Respond on time, send exactly what was asked for, and keep your submission clean and organized in tax. That’s usually all it takes to close the file in two to six weeks.
Three decisions tend to determine how things go: get your response in before the deadline, submit through CRA My Business Account so you walk away with a confirmation number, and if the letter touches business expenses, GST/HST, or a Notice of Reassessment, talk to a professional before you send anything.
If you received a CRA review letter or reassessment and are not certain of your next step, book a free 20-minute call with intaX Calgary. Bring the letter. Our team reviews it with you, tells you exactly what it means, and helps you respond in a way that protects your position. Visit intax.ca
Frequently Asked Questions: CRA Audit Alberta
Q: What is the difference between a CRA review and a CRA audit in Alberta?
A CRA review is fairly contained in tax. Cait zeroes in on one or two specific items and asks you to provide backup documentation. Most wrap up within two to six weeks with nothing extra owed. An audit is a much broader exercise, pulling your books apart across multiple tax years. The good news is that a review doesn’t have to turn into an audit. Respond promptly, respond completely, and most of the time that’s the end of it. But if the CRA isn’t satisfied with what you send back, an audit can follow.
Q: How long does the CRA have to audit me in Alberta?
Individuals typically have a three-year reassessment window from the date of their original Notice of Assessment, for corporations, that stretches to four years, as covered in CRA publication P148. Both of those windows assume everything was filed honestly in taxes. The moment fraud or misrepresentation enters the picture, the clock disappears entirely, and the CRA can go back as far as it needs to. Keeping solid, well-organized records for a minimum of six years is the simplest way to stay protected within the standard limits.
Q: What happens if I ignore a CRA review letter?
Miss the deadline by usually 30 days, and the CRA doesn’t wait around. It adjusts your return based solely on what it already has on file, and that adjustment is rarely in your favor. On top of that, going silent on a review letter is one of the fastest ways to invite a full audit on your future returns.
Q: Can I dispute a CRA reassessment if I disagree?
Yes, the timeline is strict. Under Section 165(1) of the Income Tax Act, you have 90 days from the date on your Notice of Reassessment to file a formal Notice of Objection. One immediate benefit of filing: CRA collection on the disputed amount is suspended while the objection is being reviewed. If the CRA denies your objection, you then have another 90 days to take the matter to the Tax Court of Canada. Missing that first 90-day window isn’t automatically the end of the road; you can apply for an extension,n but only up to one year after the original deadline. Once that 15-month total window closes, your options close with it.
Q: What documents do I need for a CRA audit in Alberta?
What the CRA asks for depends entirely on what it’s looking at. Vehicle claims usually mean producing a mileage logbook. Home office claims typically require receipts and a floor-plan calculation. Input tax credit claims call for vendor invoices that include GST registration numbers, and contractor payments generally need contracts and T4A slips to back them up. Whatever the request, the CRA expects you to hold onto your records for at least six years. When it comes to responding, keep it focused intax. casend exactly what was asked for, nothing more. Tight, organized responses tend to get resolved the fastest.
