N
The Global Insight

How many years can you go back to amend a tax return in Canada?

Author

Mia Phillips

Updated on March 06, 2026

10
Wait until you receive your notice of assessment before asking for changes. Generally you can only request a change to a return for a tax year ending in any of the 10 previous calendar years.

How far back can you adjust a tax return CRA?

Online or by mail, you can request an adjustment for any of the 10 previous calendar years. For example, a request made in 2021 must relate to 2011 or a later tax year. Adjustment requests for different years should be on different forms but they can be mailed in together or submitted to the CRA at the same time.

Does the CRA review every tax return?

We review approximately 3 million tax returns every year under our income tax review programs. These reviews help make sure your tax return is accurate and that our tax system is looking out for all Canadians.

What is the penalty for filing an incorrect tax return?

A careless mistake on your tax return might tack on a 20% penalty to your tax bill. While not good, this sure beats the cost of tax fraud — a 75% civil penalty. The line between negligence and fraud is not always clear, however, even to the IRS and the courts.

How many years can you go back to correct a tax return?

three years
The Internal Revenue Service limits the amount of time you have to file a 1040X to the later of three years from the date you file the original tax return, or two years from the time you pay the tax for that year.

What happens if you mess up your taxes Canada?

The Canada Revenue Agency will only accept one return per tax year. Once you’ve filed your return (mistakes and all), you can’t file a new one. But you can correct the original by way of an adjustment. CRA has two ways for you to file an adjustment request – online or by mail.

Does CRA check your bank account?

CRA then can proceed to audit you… so you may think – go ahead because there are no records. They can audit your bank account and assume that every cash deposit is in fact income – it will be your burden to prove otherwise (such as the money was a gift). They can perform an indirect determination of income by expenses.

How many years can CRA go back to audit?

four years
The CRA audit time limit states that the agency has four years from the date on your Notice of Assessment to go back and conduct an audit. This means if you file your 2017 tax return in April 2018 and receive your assessment in June 2018, the CRA can audit this return until June 2022.

When to call the CRA for a tax refund?

After you filed your return, wait 8 weeks to call the CRA for an update on the receipt of your return or status of your refund if you reside in Canada. If you reside outside of Canada please wait 16 weeks before you call the CRA.

When do I get my CRA reassessment notice?

Understanding CRA Reassessment Processing Time. When you first file your tax return, the CRA will review it and provide you with a Notice of Assessment. Typically, you will receive this notice within two weeks if you filed electronically or within about eight weeks (or more) if you mailed in paper copies of your tax return.

Where do I get my CRA tax form?

In 2018, the CRA will start mailing income tax forms to Canadians who file paper returns. This means you will no longer need to go to Canada Post, Caisse Populaire Desjardins, or Service Canada locations to pick up your printed tax forms and guides.

When does CRA conduct audits or investigations?

In extreme cases, if the CRA suspects a taxpayer of fraud or wilfully trying to evade paying taxes, the CRA’s Criminal Investigations Program (CIP) may conduct a criminal investigation. When does CRA audit a taxpayer?