If you are filing electronically, do not send us a paper copy of the slips or summary. For more information, go to Filing Information Returns Electronically.
If you are filing on paper, use the T4 Summary, Summary of Remuneration Paid, to report the totals of the amounts reported on the related T4 slips. Send the original summary and the related slips to the Ottawa Technology Centre.
As part of our continuing efforts toward sustainable development, we no longer mail out the pre-printed T4 Summary. You can get a T4 Summary here or by calling 1-800-959-2221.
For detailed completion instructions, see T4 Summary line instructions.
Each year, we verify the calculations you made on the T4 slips that you filed with your T4 Summary. We do this to make sure that the pensionable and insurable earnings you reported agree with the CPP and EI deductions you remitted. See Pensionable and Insurable Earnings Review (PIER).