What caused the TurboTax ON479-A CARE credit reassessment error?

The TurboTax glitch failed to accurately capture or port over the lower-earning spouse's net income into Form ON479-A. Because household income calculation was left incomplete or set to zero, the software mistakenly awarded families the Ontario CARE credit when their combined family net incomes actually disqualified them.

How much do affected TurboTax users owe the CRA?

Reported balances owing vary drastically based on family size and the number of tax years impacted. Taxpayers are experiencing reassessments ranging from $2,500 to upwards of $15,000, which includes the original tax credit clawbacks alongside compounded interest penalties levied by the CRA.

Does TurboTax cover the CRA reassessment under its guarantee?

TurboTax provides a 100% Accurate Calculations Guarantee that pledges to cover interest penalties resulting from software calculation errors. However, users must formally file an accuracy guarantee claim via the Intuit Support portal with a valid incident ID to request processing. Note that the baseline tax obligation itself is generally not refunded, only the accrued interest penalties.

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CRA Reassessment of Ontario Child Care Credit: TurboTax Software Error Guide

Facing a sudden CRA Notice of Reassessment on your 2021 to 2023 tax filings? Discover the root cause behind the TurboTax Form ON479-A Ontario CARE tax credit calculation glitch, learn how much you may owe, and get a step-by-step recovery... Read More

by Sandy Law
May 19, 2026
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CRA Reassessment of Ontario Child Care Credit: TurboTax Software Error Guide