✅ Quick Answer
A Revenu Québec “Mon Dossier” (My Account) file error is most often one of three things: you’re trying to sign in with old clicSÉQUR credentials on the newer Government Authentication Service login (the two are not interchangeable), the service is going through a scheduled outage, or your multi-factor authentication (SMS or Authenticator app) step hasn’t been set up correctly. Confirm which login method you’re using first — that resolves most access errors on its own.
⚡ TL;DR — 5-Step Fix
- 1. Confirm your login method — clicSÉQUR credentials do not work with the Government Authentication Service, and vice versa.
- 2. Check for a scheduled outage — Revenu Québec publishes planned service unavailability notices.
- 3. Complete multi-factor authentication properly — have your phone ready for the SMS code or Authenticator app.
- 4. Clear your browser cache and cookies, or try a private/incognito window.
- 5. Call technical support if the error is labeled a “technical error” — 1-866-423-3234 (Canada/US).
What Is “Mon Dossier”?
“Mon Dossier” (French for “my file”) is Revenu Québec’s secure online portal, called My Account for Individuals in English. It lets you view your notices of assessment, file and adjust income tax returns, check refund status, manage direct deposit, and handle social program files like the Solidarity Tax Credit — all in one place.
There’s a separate version for businesses (“Mon dossier pour les entreprises”) and for professional representatives, each with its own sign-in requirements, so make sure you’re using the correct one for your situation.
Why the File Error Happens
- Mixing up clicSÉQUR and the Government Authentication Service — Revenu Québec explicitly states that a clicSÉQUR user code and password cannot be used to sign in via the newer Government Authentication Service. These are two separate credential systems.
- Scheduled service outages — Revenu Québec periodically takes My Account offline for maintenance, publishing notices under “Scheduled Service Outages.”
- Incomplete multi-factor authentication — sign-in requires a second verification step (SMS code or Authenticator app), and a missed or expired code will block access.
- Browser cache or cookie conflicts — especially common after Revenu Québec updates its sign-in pages.
- A genuine technical error on Revenu Québec’s end — the portal has a dedicated error page for this, directing users to call technical support directly.
“A Running Instance of Acrobat Caused an Error”: Fix It Fast
First-Time Sign-In Requirements
If this is your first time signing in via the Government Authentication Service, you’ll need either a recent notice of assessment number (from the last two to three taxation years) or, if you don’t have one, you can sign in through a supported sign-in partner instead.
How to Fix a Mon Dossier File Error
1. Confirm Which Login System You’re Using
Check whether you originally registered through clicSÉQUR or the newer Government Authentication Service, and make sure you’re entering the matching credentials. If you’re unsure, use the “sign in via a sign-in partner” option instead of guessing.
2. Check for a Scheduled Outage
Before assuming the error is on your end, check Revenu Québec’s Scheduled Service Outages notice on their website — if My Account is down for maintenance, retrying won’t help until the window ends.
3. Complete Two-Factor Verification
- Make sure your phone is nearby and has signal before starting the sign-in process.
- Enter the SMS code or Authenticator app code promptly, since these typically expire after a few minutes.
- If you no longer have access to your registered phone number, you’ll need to update it through the recovery process rather than retrying the same code.
4. Clear Cache and Try a Private Window
Clear your browser’s cached files and cookies, or open a private/incognito window, then reload the My Account sign-in page fresh before trying again.
5. Call Technical Support for a Genuine Technical Error
If the portal shows a dedicated “technical error” page saying the service can’t be accessed, this points to an issue on Revenu Québec’s side rather than your credentials. Contact technical support at 1-866-423-3234 (calling from Canada or the US).
Error Type Reference
| Symptom | Likely Cause | Fix |
|---|---|---|
| Credentials rejected | clicSÉQUR vs. Government Authentication Service mismatch | Use the matching login system, or sign in via a partner |
| “Please try again later” message | Scheduled service outage | Check the outage notice, wait for the window to end |
| Verification code not accepted | Expired or delayed SMS/app code | Request a fresh code and enter it promptly |
| “Technical error” page | Genuine issue on Revenu Québec’s servers | Call 1-866-423-3234 |
For a comparable account-access issue with a different portal, see our related guide: MyCRA Account Login Error 403 Forbidden: Quick Fix Guide, which covers similar security-block and cache-related fixes.
Frequently Asked Questions
Can I use my old clicSÉQUR login to access My Account?
No. Revenu Québec confirms that a clicSÉQUR user code and password cannot be used to sign in via the Government Authentication Service — you need to use the matching credential system or sign in through a partner instead.
What do I need for my first sign-in via the Government Authentication Service?
You’ll typically need the notice of assessment number from one of your last two to three taxation years, or you can sign in through a supported sign-in partner if you don’t have that on hand.
Does this error affect my actual tax filing?
No, an access error to My Account only affects your ability to view or manage your file online — it does not change your filing deadline or any return you’ve already submitted.
Who do I contact if none of these fixes work?
For a genuine technical error page, call 1-866-423-3234. For general account or tax questions, Revenu Québec’s client services can be reached at 1-800-267-6299.
