Behind on your taxes in Quebec? What late returns cost, what they unlock, and the order to file

A catch-up result depends on tax owing, filing and payment dates, earlier penalties and credit eligibility. The rules below concern 2025 unless another year is stated; official sources were checked September 27, 2026.

What a late return actually costs

The federal late-filing penalty is a percentage of the balance owing, which is why a late return with nothing owing does not attract that penalty. Other penalties can still apply. For the 2025 return, the CRA charges:

• 5% of the balance owing, plus 1% for each full month the return is late, up to 12 months;
• 10% plus 2% per full month, up to 20 months, if the CRA had sent a demand to file and charged a late-filing penalty for 2022, 2023 or 2024.

Interest begins after the balance-payment deadline; for an ordinary 2025 return, that deadline was April 30, 2026. Filing does not pay the debt. Filing on time can avoid the late-filing penalty while a balance remains unpaid. A payment agreement with Revenu Québec depends on the circumstances and does not mean interest stops.

What a late return can unlock

Late filing can postpone benefit and credit payments, and some Quebec credits have a claim window that closes.

The solidarity tax credit is claimed with Schedule D of your Quebec return (or in My Account), and each period's claim must be made by December 31 of the fourth year after the tax year it is based on:

• the 2022 return (July 2023 to June 2024 payments): claim by December 31, 2026;
• the 2023 return (July 2024 to June 2025): by December 31, 2027;
• the 2024 return (July 2025 to June 2026): by December 31, 2028.

If you never filed one of those returns, Revenu Québec's instruction is to complete it and file it with Schedule D. Direct deposit is needed to complete the claim; the other eligibility conditions still apply.

How far back you can file, and how

• Federal: the CRA's NETFILE service, subject to return and software eligibility, accepts initial returns for 2018 to 2025 until January 29, 2027. ReFILE, for amending a return already filed, covers 2022 to 2025.
• Quebec corrections: do not send a second return. My Account supports specified changes for 2022 to 2025; certified software can amend 2022 to 2025; anything older, or a change My Account cannot make, goes on form TP-1.R-V, Request for an Adjustment to an Income Tax Return, mailed with supporting documents.

NETFILE is the taxpayer’s channel; preparers use their applicable filing services. Supported years do not establish a preparer’s registration.

When to consider a voluntary disclosure

If bringing your file up to date would expose you to penalties or interest, Revenu Québec's voluntary disclosure program is designed for that case: when an application is accepted, Revenu Québec does not take legal action or impose penalties, and interest relief measures can apply. Four conditions apply:

• spontaneous: filed before an audit or investigation begins concerning you, or a person related to you, about the disclosed information;
• complete: it covers every tax law, year and period where an obligation was missed, with your income and the amount owed calculated or estimated;
• verifiable: you hand over the returns and documents needed to check it;
• paid: the amount owed (or the part you can estimate) is enclosed with form LM-15-V, unless a payment agreement is reached.

Disclosures that concern the GST or HST go to the CRA's own program instead.

The order that usually makes sense

1. List the missing years and, for each, whether you expect a balance owing, a refund, or neither.
2. Check urgent obligations: formal demands to file, payment dates and credit deadlines, including a solidarity claim based on 2022 before December 31, 2026.
3. Assess balances and payment: interest continues until payment, not merely until submission.
4. Check refund deadlines too before prioritizing the remaining years; waiting can remove access to a claim.
5. Gather slips and notices before you start: your notices of assessment for the years you did file, RL and T slips, and any letter asking for a return.

Hypothetical example: two different deadlines

A taxpayer has a formal demand for 2024 and missing documents for a possible 2016 refund. Both deadlines need attention; a refund year should not automatically wait. In 2026, the federal ten-year outer limit for discretionary relief reaches 2016, while Revenu Québec also lists 2016–2025 for these requests. Neither that window nor filing guarantees a refund. Solidarity claims have a separate deadline.

After the returns are in

Revenu Québec’s ordinary reassessment period is not the document-retention period. For an income-tax return filed late, CRA requires supporting records for six years from filing. Property history, disputes or a specific retention requirement can require longer.

TaxCove's late and prior-year returns service starts from the list of missing years and the notices you have received, before any return is prepared.

General information for Quebec residents, not advice on your particular situation.

General information only; this guide does not constitute personalized tax advice.