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	Auto-fill my return	11pm January 10, 2026	6 am January 13, 2026

Page details

2025-12-17