Amended T4

An amended T4 is a corrected T4 slip issued after the original T4 needs to be fixed.

In plain language, payroll uses an amended T4 when the slip was basically the right kind of document, but some reported information on it was wrong and has to be corrected.

Why Amended T4 Matters

An amended T4 matters because year-end payroll work does not always end once the original slips are filed.

It helps explain:

• what happens when payroll discovers an error after filing
• why corrected year-end reporting is different from day-to-day payroll processing
• why a correction does not always mean the whole slip should be cancelled

Readers often know that a T4 can be wrong, but they do not know the payroll term for the correction process.

How It Works In Canada

In Canadian payroll, an amended T4 is used when payroll needs to correct information already reported on a T4 slip. The payroll team usually goes back to the underlying payroll records, confirms what should have been reported, and then prepares the corrected slip through the appropriate filing method.

That means the amended T4 sits at the intersection of:

• payroll records and reconciliation
• year-end reporting review
• corrected filing workflow
• employee communication after year end

Example

An employer discovers after filing that a taxable amount on an employee’s T4 was reported incorrectly. Payroll reviews the year-end records and issues an amended T4 to correct the reported information.

Common Misunderstandings

• An amended T4 is not the same as a cancelled T4. One corrects a real slip; the other removes a slip that should not stand as filed.
• An amended T4 is not a new pay stub. It corrects year-end reporting, not a current payroll period.
• An amended T4 is not just an informal note. It is part of formal correction workflow.

Related Terms

• T4
• Cancelled T4
• T4 Summary
• Payroll Register
• Taxable Benefit
• Payroll Remittance

Knowledge Check

1. Is an amended T4 used to correct a T4 that was filed with wrong information? Yes.
2. Is an amended T4 the same as a current-period pay stub? No.
3. Is amending a T4 different from cancelling a T4? Yes.

Caveat

The filing method and correction steps can change over time. The stable concept is that an amended T4 is the correction path when the original slip exists but reported information needs to be fixed.