But while applying there is this text box where you can mention any details . There we have mentioned why we are deferring just couple of sentences. In below field of webform :
Your enquiry (required)
Your message must be in English or French, Canada's official languages. (Please limit the text to 1500 characters).
Note: If you are submitting an address change, include your new address (street name, street number, city, province, postal code and country). If you are submitting a change in email address, include and specify your old email address and your new email address.