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Just a few questions about your tax return … (July 2021)

Between February 8 and June 21 of this year, the Canada Revenue Agency (CRA) received and processed just under 29 million individual income tax returns filed for the 2020 tax year. The sheer volume of returns and the processing turnaround timelines mean that the CRA does not (and cannot possibly) do a manual review of the information provided in a return prior to issuing the Notice of Assessment. Rather, all returns are scanned by the Agency’s computer system and a Notice of Assessment is then issued.

In addition, the CRA has, for many years, been encouraging taxpayers to fulfill their filing obligations online, through one of the Agency’s electronic filing services. This year, just over 26 million (or 91.5%) of those returns were filed by electronic means. While e-filing means that the turnaround for processing of returns is much quicker, there is, by definition, no paper involved. The Canadian tax system has always been what is termed a “self-assessing” system, in which taxpayers report income earned and claim deductions and credits to which they believe they are entitled. Prior to the advent of e-filing there were means by which the CRA could easily verify claims made by taxpayers. Where returns were paper-filed, taxpayers were usually required to include receipts or other documentation to prove their claims, whatever those claims were for. For the over 90% of returns which were filed this year by electronic means, no such paper trail exists. Consequently, the potential exists for misrepresentation of such claims (or simple reporting errors) on a large scale.

The CRA’s response to that risk is to conduct a variety of review programs, some of them before a Notice of Assessment is issued for the taxpayer’s return, and others after that Notice of Assessment has been issued and sent to the taxpayer. Regardless of the timing, in all cases the purpose of the review is to obtain from the taxpayer the information or documentation needed to support claims for deductions or credits made by the taxpayer on the return. The CRA also administers a Matching Program, in which information reported on the taxpayer’s return (both income and deductions) is compared to information provided to the CRA by third-party sources (like T4s filed by employers or T5s filed by banks or other financial institutions).

Being selected for review under either program means, for the individual taxpayer, the possibility of receiving unexpected correspondence, or a telephone call, from the CRA. Receiving such correspondence or call from the tax authorities is almost guaranteed to unsettle the recipient taxpayer, who may immediately conclude that he or she has done something very wrong and is facing a big tax bill — maybe even a tax audit. However, in the vast majority of cases, the contact is just a routine part of the Agency’s processing review mandate.

A taxpayer whose return is selected as part of a processing review program will be asked to provide verification or proof of deductions or credits claimed on the return -usually by way of receipts or similar documentation. The Matching Program, on the other hand, involves comparison by the CRA of information received from different sources (i.e., matching up the amount of employment income reported by a taxpayer with the amount showing on the T4 slip issued by that taxpayer’s employer). Where the figures match up, there is no need for the further action by the CRA. Where they don’t, the taxpayer will likely be contacted with a request for an explanation of the discrepancy.

Of course, most taxpayers are not concerned so much with the kind or program or programs under which they are contacted as they are with why their return was singled out for review or follow-up. Many taxpayers assume that it’s because there is something wrong on their return, or that the letter is the start of an audit, but that’s not necessarily the case. Returns are selected by the CRA for post-assessment review for a number of reasons. Canada’s tax laws are complex and, over the years, there are areas in which the CRA has determined that taxpayers are more likely to make errors on their return. Consequently, a return which includes claims in those areas (like dependant tax credit claims, claims for medical expenses, moving expenses or tuition tax credits) may have an increased chance of being reviewed. Where there are deductions or credits claimed by the taxpayer which are significantly different or greater than those claimed in previous returns that may attract the CRA’s attention. And, if the taxpayer’s return has been reviewed in previous years and, especially, if an adjustment was made following that review, subsequent reviews may be more likely. Finally, many returns are picked for the processing review programs simply on the basis of random selection.

Regardless of the reason for the follow-up, the process is the same. Taxpayers whose returns are selected for review will be contacted by the CRA, usually by letter, identifying the deduction or credit for which the CRA wants documentation or the income or deduction amount about which a discrepancy seems to exist. The taxpayer will be given a reasonable period of time — usually a few weeks from the date of the letter — in which to respond to the CRA’s request. That response should be in writing, attaching, if needed, the receipts or other documentation which the CRA has requested. All correspondence from the CRA under its review programs will include a reference number, which is usually found in the top right-hand corner of the CRA’s letter. That number is the means by which the CRA tracks the particular inquiry and should be included in the response sent to the Agency. It’s important to remember, as well, that it’s the taxpayer’s responsibility to provide proof, where requested, of any claims made on a return. Where a taxpayer does not respond to a CRA request or does not provide such proof, the Agency will proceed on the basis that the requested verification or proof does not exist and will assess or reassess accordingly.

Taxpayers who have registered for the CRA’s online tax program My Account (or whose representative is similarly registered for the Agency’s Represent a Client online service) can usually submit required documentation electronically. More information on how to do so can be found on the CRA website at

Whatever the reason a particular return was selected for post-assessment review by the CRA, one thing is certain. A prompt response to the CRA’s enquiry, providing the Agency with the information or documentation requested will, in the vast majority of cases, bring the matter to a speedy conclusion, to the satisfaction of both the Agency and the taxpayer. The CRA website also includes more detailed information on the return review process, which is available at

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