[Canada] Review and correct your employee T4 slips and T4 summary

Your T4 summary and employee T4 slips are available to review in your Wave account from November 1, 2025.

Reviewing your employees’ T4 slips allows you to review wages, taxes, and benefits received in the calendar year, as well as their personal details, and make any corrections.

Review T4 summary and employee T4 preview slips

Update incorrect employee information

Add a missing employee benefit or deduction

Review T4 summary and employee T4 preview slips

T4 preview slips are not for filing. Final T4 slip versions will be available in February 2026.

Your preview contains T4 slips for each of your employees and your T4 Summary for the calendar year. They reflect only wages and benefits paid up to the date they are previewed. If you’ve approved a payroll with a payday in the future, generate another preview after the payday has passed to include those wages and taxes.

To generate your employee T4 slip and T4 summary preview:

1. On the left-side menu, click Payroll > Tax Forms.
2. Next to T4 Summary, under Actions, click Preview. This generates your T4 summary preview.
3. Enter your E-file transmitter information and contact information.
4. For each employee, in the T4 Fields section, select a response from the dropdown menu.
5. To generate the individual T4 slip previews, click Review T4 preview, then click Download preview.

To discard your current preview:

1. Open the Tax Forms page.
2. Next to T4 Summary, under Actions, click Download.
3. At the top of the page, select Discard current form and start over.

Verify that your employees' T4 preview is correct

To ensure that your employees’ T4 previews are correct, verify that:

• All employees paid in the calendar year are reported in the preview
• All employee wages are reported accurately
• All employee benefits are reported accurately
• All employee Social Insurance Numbers are accurate
• All Canada Pension Plan contributions and Employment Insurance premiums are accurate for eligible employees

The maximum annual employee CPP contributions in 2025 is $4,034.10. The maximum annual CPP2 contribution is $396. The maximum annual employee EI premium amount is $1,077.48.

Update incorrect employee information

If an employee’s name, address, or SIN is incorrect on the T4 preview, update the information in your Wave account:

1. On the left-side menu, click Payroll > Employees.
2. In the Personal Information tab, update the incorrect information.
3. Click Save.

Once the information is updated, discard and regenerate the T4 preview in Wave to see the changes.

Add a missing employee benefit or deduction

If you are missing a benefit or a deduction and have yet to run the final payroll of the year, you can still add it to your payroll. To add a missing benefit or deduction:

1. On the left-side menu, click Payroll > Employees.
2. In the employee menu, click Benefits & Deductions.
3. Click Add to Pay to add a benefit, or Deduct from Pay to add a deduction.
4. Click Save.

Once the payroll is approved and processed, discard and regenerate the T4 preview to see the updated wages.

If there are additional corrections that need to be made on an employee’s T4 slip, our Support Team can help. To reach them, open Mave, Wave’s automated chatbot, and request a Support Agent. The deadline to request corrections is January 31, 2026.