Where I can get my T4

They will only provide the info by phone if you can prove identity, usually with last years Notice of assessment.

As with every inquiry.

Go to the CRA website, sign up for MY ACCOUNT. That way you can probably access & print out a copy of yourT4. Be prepared, the sign up procedure is somewhat tricky, for obvious security reasons.

You can also call cra at 18009598281 and they will give it to you over the phone.