Make corrections after filing
Please note that the CRA introduced a stricter validation process in January 2025. XML files that do not conform with our schema and specifications may now be rejected. You can validate your XML file by using an XML parser. This will allow you to verify the format and content of your XML file against the 2025 schema files provided by the CRA. You can find validating parsers on the Internet.
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After you file your original information return, you may need to do some corrections on slips and file amended or cancelled slips.
Amend or cancel slips using Internet file transfer (XML)
When you are filing amended slips
- include only the slips that need to be amended
- use the report type code "A" on the summary and slips
- enter all data that has not changed for the slip and make changes to fields that require corrections
- include only the totals from the amended slips on the amended summary
- complete the " Filer Amendment Note " on the summary page to provide reason for amendment. When specific reasons apply for individual slips, include the name of recipient.
When you are filing cancelled slips.
- include only the slips that need to be cancelled
- use the report type code "A" on the summary
- use report type code "C" on the slips
- enter all data that was on the original slip (empty slip will be rejected)
- include only the totals from the cancelled slips on the amended summary
Start Internet file transfer (XML)
Amend or cancel slips using Web Forms
Importing a submission that was previously filed using Web Forms
If you have saved a return that was filed using Web Forms you can import it to create your amendment.
When you are filing amended slips:
- import the original file
- select the return type "Amended" on the summary
- choose the slips you want to amend
- remove the slips that do not require amendment
- correct the information or financial fields that require corrections
- review the amended summary that Web Forms creates for you
- submit your return
When you are filing cancelled slips
Note: Functionality is not available at the moment
- import the original file
- select the return type "Amended" on the summary
- choose the slips you want to cancel and select "Cancelled" for the slip type
- remove the slips that do not require to be cancel
- keep the information that is on the slip (empty slip will be rejected)
- review the amended summary that Web Forms creates for you
- submit your return
Create an amendment or cancelled slips
- select "Start a new original or amended return" then choose "Amended" as the type of information return on the summary
- input information for only the slips that need to be amended or cancelled and make sure to choose the correct information on each slips "Amended" or "Cancelled"
- for an amendment, enter all data that has not changed for the slip and make changes to fields that require corrections
- for cancelled slips, enter all the same information that is on the slip to cancel (empty slip will be rejected)
- select "Explanation for amendments" dialogue box to provide reason for amendment. When specific reasons apply for individual slips, include the name of recipient
- review the amended summary that Web Forms creates for you
- submit your return
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