Top Signs You Should Get a Second Opinion on Your Taxes

Last updated: Jun. 11, 2026 

Most Canadians file and move on, trusting the process worked. But what if it didn’t? Here are the clearest signs it’s worth having another set of eyes on your return.

There’s a quiet assumption most of us make after filing: if the numbers went through and the CRA accepted the return, it must be right. But accepted isn’t the same as optimized. The CRA doesn’t tell you about deductions you forgot to claim, credits you were eligible for, or strategies that could have lowered your bill.

Getting a second opinion on your tax return isn’t an indictment of your current accountant or a sign something has gone terribly wrong. It’s simply a check. The same way you’d review a contractor’s quote or get a second read on a legal agreement before signing.

For something that affects your finances every single year, it’s a reasonable thing to do.

So how do you know when it’s worth it? Here are the clearest signals.

The Signs It’s Time for a Second Opinion

1. You get a large refund every year

A pattern of big refunds means you’ve likely been over-withheld and possibly missing planning opportunities that could put that money to work sooner.

2. Your situation got more complex

A new rental property, a side business, an inheritance, stock options, or a major life event can introduce new tax considerations your current approach may not cover.

3. You’ve had the same advisor for years without a review

Loyalty is great. But if your tax strategy hasn’t evolved as tax laws and your life have changed, familiarity may be costing you.

4. You feel like you’re paying a lot but don’t know why

If you can’t get a clear explanation of your tax bill, that’s worth exploring. Good tax advice should be understandable, not a black box.

5. Your income or business structure changed

Moving from employment to self-employment, incorporating, or taking on a partner all have significant tax implications that benefit from a fresh look.

6. You use tax software and file on your own

DIY software does what you tell it to. It doesn’t know what you don’t know, and the deductions you miss are the ones you never entered

Why “The CRA Accepted It” Doesn’t Mean It Was Right

A lot of Canadians use CRA acceptance as a proxy for accuracy. It’s understandable, if there were a problem, you’d hear about it, right? Not necessarily.

The CRA’s assessment process checks your return against what you submitted, and flags obvious arithmetic errors or missing information. What it doesn’t do is compare your return against what you could have submitted — the deductions you were entitled to but didn’t claim, the credits that applied to your situation, or the planning moves that could have legitimately reduced your tax bill.

Leaving money on the table doesn’t trigger a notice. It just quietly happens, year after year.

Common items Canadians miss: the disability tax credit (and its retroactive application for past years), eligible home office deductions, carrying forward unused RRSP room, the caregiver amount, capital loss carryforwards, and provincial tax credits that don’t appear on the federal return.

Life Events That Should Trigger a Review

Even if you’re happy with your current accountant, certain life changes are natural moments to get a fresh perspective. Any of these warrant at least a conversation:

• You bought or sold a property, including a cottage or secondary home
• You got married, separated, or divorced
• You had a child or became a caregiver for an aging parent
• You started a business, went incorporated, or became self-employed
• You received an inheritance, a large gift, or a significant windfall
• You retired or are within five years of retirement
• Your investment portfolio grew significantly or you began drawing from registered accounts
• You moved provinces — tax obligations vary significantly across Canada

These aren’t edge cases. They’re some of the most common experiences in adult financial life and each one can change your tax picture considerably.

Navigating a life change and not sure how it affects your taxes? Our free Canadian tax planning guide walks through the key scenarios and what to watch for.
👉 Download the free tax planning guide

What a Good Second Opinion Actually Looks Like

A second opinion isn’t just someone re-entering your numbers into different software. A meaningful review looks at your last one to three years of returns together because tax planning is longitudinal. What happened in a prior year (unused RRSP room, a capital loss, a tuition credit) can affect what you should do this year.

A thorough review will examine whether all eligible deductions were claimed, whether any credits were missed or could be retroactively applied, whether your withholding or instalment amounts make sense, and whether there are any planning strategies, income splitting, timing of RRSP contributions, structuring of business income, worth considering going forward.

Importantly, a good second opinion should also tell you when everything looks fine. Confirmation that your return was well-prepared is also valuable, it means you can file with confidence next year.

In Canada, you can amend prior-year returns going back 10 years using the T1-ADJ process. If a second opinion turns up missed deductions from past years, it’s often possible to recover what you’re owed — not just going forward, but retroactively.

What About the Relationship with My Current Accountant?

This is the concern that holds most people back and it’s worth addressing directly. Getting a second opinion isn’t a betrayal of your current accountant, and a good professional won’t take it that way. Doctors, lawyers, and financial advisors all expect clients to seek additional perspectives on important decisions. Tax work is no different.

In fact, if a second opinion confirms your current accountant is doing excellent work, that’s a good outcome for everyone. And if it surfaces something worth addressing, you now have the information to have a productive conversation, or to make an informed decision about your next steps.

We offer a straightforward, no-obligation review of your last return. No pressure — just a clear picture of whether your taxes were optimized and what, if anything, could be done differently.
👉 Get a second opinion consultation

Frequently Asked Questions

Will getting a second opinion cause problems with the CRA?

No. Reviewing your return, identifying missed items, and filing a T1-ADJ to amend prior years is a completely normal and legitimate process. The CRA expects it and processes adjustments routinely.

How far back can a second opinion go?

Generally up to 10 years. If missed deductions or credits are identified in prior returns, a T1-ADJ can be filed to recover what you’re owed, often with surprisingly meaningful results.

Is a second opinion worth it if my taxes are straightforward?

It depends. If you have simple T4 income, no investments, no business activity, and no major life changes, your tax return is likely fine. But “straightforward” is often in the eye of the beholder — many Canadians have more complexity than they realize.

What should I bring to a second opinion review?

Your last one to three years of Notice of Assessments, your most recent T4s and tax slips, and any documentation related to major financial events like property sales, RRSP contributions, business income, and so on. The more context, the better the review.

Do I have to switch accountants if I get a second opinion?

Absolutely not. A second opinion is just a review. What you do with the findings,  whether that’s adjusting your current approach, switching advisors, or simply filing with more confidence,  is entirely up to you.

Ready to Find Out Where You Actually Stand?

Our team works exclusively with Canadians. We’ll take a clear-eyed look at your return and tell you honestly what we find. No pressure, no commitment.
👉 Get a free second opinion