If you’re trying to use CRA AutoFill and it’s not working, you’re not alone. This is one of the most common issues taxpayers experience during tax season.
The good news is that in most cases, the problem is not with your tax software. It’s usually related to CRA systems, browser settings, or session issues.
Let’s break it down clearly.
Do You Need CRA AutoFill to File Your Taxes?
First, an important clarification: You do NOT need CRA AutoFill to file your taxes.
AutoFill is simply a convenience feature that pulls your tax slips directly from the CRA into your tax software.
You can still:
File your taxes without AutoFill
Manually enter your T-slips
Upload your slips and have them imported
So if AutoFill isn’t working, you can still complete your return without any issues.
Requirement: CRA My Account
To use AutoFill, you must have a CRA My Account.
Without it:
You cannot connect to CRA
AutoFill will not work at all
If you don’t have an account, you’ll need to register first before using this feature.
Common Reasons CRA AutoFill Is Not Working
1. CRA System Maintenance
One of the most common reasons is that CRA systems are temporarily unavailable.
CRA often performs maintenance during:
Late evenings
Overnight hours
Weekends
If AutoFill isn’t working:
Check the CRA website for maintenance notices
Try again later
If CRA is down, AutoFill will not work on any tax software.
2. Browser Pop-Up Blockers
AutoFill requires you to:
Leave your tax software temporarily
Log in through a CRA authorization window
If your browser blocks pop-ups, the process breaks.
Fix:
Disable pop-up blockers in your browser
Allow redirects for the tax software and CRA
This is one of the most frequent causes of AutoFill failure.
3. Browser Compatibility Issues
Some browsers don’t handle CRA’s login flow well. Common issues:
Session loops
Redirect failures
Stuck on “Agree” screen
For example, users sometimes experience a loop where clicking “Agree” just reloads the same page instead of proceeding to login . Recommended fixes:
Use Google Chrome
Avoid Firefox if issues occur
Try Incognito / Private mode
Clear cache and cookies
4. CRA Session Timeout (ERR.029)
A very common technical issue is a CRA session timeout, often labeled as: Auto-Fill ERR.029
What happens:
You click “Agree”
The page refreshes instead of continuing
You never reach the CRA login screen
This is typically a CRA-side issue, not a software issue. What you can try:
Log into CRA My Account first in your browser
Then return and retry AutoFill
If it still fails, there may be no workaround other than trying again later.
5. Browser Extensions or Privacy Settings
Ad blockers and privacy tools can interfere with:
CRA authentication
Session cookies
Redirect flows
This is especially common on Safari and privacy-focused setups.
Fix:
Disable extensions temporarily
Allow cookies for CRA
Try a different browser
What If CRA AutoFill Still Doesn’t Work?
If you’ve tried everything and it still doesn’t work, don’t worry.
You still have multiple options:
Option 1: Upload Your Tax Slips
You can upload your T-slips, and AI can automatically extract and enter the data into your return.
Option 2: Enter Slips Manually
Use the search bar in your tax software and input the numbers directly.
Both methods work just as well as AutoFill.
Key Takeaways
CRA AutoFill is optional, not required
You must have CRA My Account to use it
Most issues are caused by:
CRA maintenance
Browser settings
Session timeouts
The problem is usually not your tax software