System maintenance details
Due to system maintenance, the following services will be unavailable.
Maintenance time
| Service |
Application |
Interruption begins (ET) |
Interruption ends (ET) |
| My Account |
- Open a non-resident tax account
|
12 am December 30, 2025
|
12 am January 1, 2026
|
| My Account |
- Tax information slips (T4 and more)
- Change my return
- Client Data Enquiry
- Carryover amounts
- View Proof of income statement
- View status of tax return
|
11 pm January 9, 2026
|
6 am January 12, 2026
|
|
My Business Account
|
Payroll
- File a return
- Internet file transfer
- Web forms
- View returns details
- Download reports
- PIER Overview
Information Returns
- File a return
- Internet file transfer
- Web forms
- View returns details
- Download notifications of errors for Part XVIII
- Download notifications of errors for Part XIX
- Download reports
TFSA
- File a return
- Internet file transfer
- Web forms
- View Return detail
- Download rejected TFSA individual records
- Download reports
Partnerships
- File a return
- Internet file transfer
- Webform
- Download reports
Contract Payments (T5018)
- File a return
- Internet file transfer
- Web forms
- View return details
- Download reports
|
3 am December 23, 2025
|
6 am January 12, 2026
|
|
My Business Account
|
- Open a non-resident tax account
|
12 am December 30, 2025
|
12 am January 1, 2026
|
|
Represent a Client
|
Payroll
- File a return
- Internet file transfer
- Web forms
- View returns details
- Download reports
- PIER Overview
Information Returns
- File a return
- Internet file transfer
- Web forms
- View returns details
- Download notifications of errors for Part XVIII
- Download notifications of errors for Part XIX
- Download reports
TFSA
- File a return
- Internet file transfer
- Web forms
- View Return detail
- Download rejected TFSA individual records
- Download reports
Partnerships
- File a return
- Internet file transfer
- Webform
- Download reports
Contract Payments (T5018)
- File a return
- Internet file transfer
- Web forms
- View return details
- Download reports
|
3 am December 23, 2025
|
6 am January 12, 2026
|
|
Represent a Client
|
- Open a non-resident tax account
|
12 am December 30, 2025
|
12 am January 1, 2026
|
|
Represent a Client
|
- Tax information slips (T4 and more)
- Change my return
- Client Data Enquiry
- Carryover amounts
- View Proof of income statement
- View status of tax return
|
11 pm January 9, 2026
|
6 am January 12, 2026
|
|
Tax information web service
|
|
11pm January 9, 2026
|
6 am January 12, 2026
|
Page details
2025-12-30
