What happens after you file?

When we receive your information return, we check it to see if you have prepared it correctly. After an initial review, we enter your return into our processing system, which captures the information and performs various validity and balancing checks. If there are any problems, we may contact you.

We also verify the calculations you made on the T4 slips to make sure that the pensionable and insurable earnings you reported agree with the CPP and EI deductions you remitted. For more information, go to Pensionable and insurable earnings review (PIER).

If you receive a pensionable and insurable earnings review (PIER) report, do not send us amended slips. Instead, respond to the PIER advising of the changes required for the employees on the listing. For more information, go to Pensionable and insurable earnings review (PIER).

After filing your information return, you may notice that you made an error on a T4 slip. If so, you will have to prepare an amended slip to correct the information. For information, go to Amending, cancelling, adding, or replacing T4 slips.

Other federal government departments use T4 information. For example, Employment and Social Development Canada (ESDC) uses the information on the T4 slip to update a person’s record of earnings file.

The information on CPP contributions that we send to ESDC determines the CPP benefits that a person will receive.

Date modified:

2015-12-17