File information returns electronically (tax slips and summaries)
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.
If you experience difficulties, please contact us at:
- Call within Canada: 1-800-665-5164, between 07:00 and 17:00 (EST)
- Call from outside of Canada: 613-940-8599
When and how to file, original, amended and canceled information slips electronically (for example, T4, T4A, T5, and other type of returns), including how to use Web Forms.
Filing electronically lets you:
- Get confirmation within minutes
- File securely
- Make changes
- Allow another authorized source, such as a tax preparer, to file for you
- Send returns for the previous ten years
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