Do anyone know how to inform ircc about new offer letter ?

[nk1]

Hello guys
I submitted my application on 19 june but there is no response
I want to defer my intake to january 2021
But I dont know how to inform ircc
Do I have just to upload my new acceptance letter or do I have to inform them
Please explain the process if u know

 

[primaprime]

Raise a webform.

 

[nk1]

Could you please explain me the process?

 

[Yangz]

follow this:
https://www.cic.gc.ca/english/contacts/web-form.asp