June 16, 2026

How to File Previous Years’ Taxes in Canada

File Previous Years’ Taxes in Canada

Life gets busy, and it is not uncommon for Canadians to miss a tax year. Whether you have one missing return or several, the good news is that the Canada Revenue Agency (CRA) allows you to file previous years’ taxes at any time. Here is how to get caught up and why you should do it sooner rather than later.

File Previous Years’ Taxes in Canada

Can You File Tax Returns for Previous Years?

Yes. The CRA accepts late returns for prior years. There is no “expiry date” on filing a past return. However, if you are owed a refund, you can generally only claim it for up to 10 years after the end of that tax year.

File Past Tax Returns

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How to File Previous Years’ Taxes

Follow these steps to file your outstanding returns:

  1. Gather your documents — Collect all T-slips (T4, T5, etc.) and receipts for each missing year. If slips are missing, you can find many of them in your CRA My Account under “Tax Information Slips.”
  2. Get the correct forms or software — You must use the specific tax forms or software version for the year you are filing. For example, a 2021 return must be filed using 2021 forms.
  3. Determine your filing method —
    • NETFILE: Electronic filing is typically available for the current tax year and the three prior tax years.
    • Paper Filing: Returns older than four years must usually be printed and mailed to your CRA tax centre.
  4. Submit and wait — After filing, the CRA will process your returns and issue a Notice of Assessment (NOA) for each year.

The Voluntary Disclosures Program (VDP)

If you have not filed for several years and expect to owe a significant amount in taxes, you may be eligible for the Voluntary Disclosures Program (VDP). If the CRA accepts your disclosure, they may waive some or all of the penalties and offer partial relief on interest. To qualify, you must come forward before the CRA starts any audit or enforcement action against you.

What Are the Penalties for Filing Late?

  • If you are owed a refund: There is no penalty for filing late.
  • If you owe taxes: The late-filing penalty is 5% of your balance owing, plus 1% for each full month your return is late (up to 12 months).
  • Repeat offenders: If you filed late in any of the three previous years and received a penalty, the late-filing penalty increases to 10%, plus 2% per month (up to 20 months).

Why You Should File Missing Returns

  1. Claim missing refunds — You cannot receive your refund until you file.
  2. Receive benefit payments — Benefits like the Canada Child Benefit (CCB) and GST/HST credits are based on your tax returns. If you don’t file, these payments stop.
  3. Stop growing interest — If you owe money, interest on the balance grows daily. Filing now stops the clock on additional penalties.
  4. RRSP room — Your RRSP contribution room is only updated when you file your taxes.

Table of Summary

Here is the blog information in 6 easy rows for quick understanding:

SectionEasy Information
1. TopicThe blog explains how to file previous years’ tax returns in Canada and get caught up with CRA.
2. Can You File LateYes, CRA allows you to file any previous year tax return anytime. Refunds are generally available up to 10 years back.
3. How to FileGather documents (T4, T5, receipts), use the correct year’s forms/software, choose NETFILE (last 3 years) or paper filing (older returns).
4. Voluntary DisclosuresCRA’s VDP program may reduce penalties and interest if you come forward before CRA audits or enforcement begins.
5. PenaltiesIf you owe tax: 5% late penalty + 1% per month (up to 12 months). Repeat cases: 10% + 2% per month (up to 20 months). No penalty if refund only.
6. Why File Old ReturnsClaim refunds, restore benefits (CCB, GST/HST credits), stop interest growth, and update RRSP room correctly.

FAQs

How far back can I file my taxes?

You can file as far back as you need to. However, the CRA’s 10-year rule means you can only request a refund or a credit for a tax year that ended within the last 10 years.

What if I don’t have my old T4 slips?

First, check CRA My Account. If they are not there, try contacting your former employer. If that fails, the CRA can often provide you with the information they have on file for those years.

Can a tax professional help with old returns?

Yes. Tax professionals have access to specialized software and EFILE services that make filing multiple prior years much faster and more accurate than doing it yourself by hand.

Catch Up Taxes

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This is general information only and not professional advice. Consult a professional before acting.