Log in to your account
Click "Check status and messages"
On the next page, click "View submitted application"
Next, click "Update form" in the "Application details" section
Check/uncheck the provinces
Click "Save & exit" at the bottom of the page
You're still not done at this stage.
After you Save & exit, you'll see the section's button turned to Revert changes in yellow.
Scroll to the bottom of this page and click the "Continue" button
On the next page, you need give a Signature. Fill in your Name & Surname, and answer the security question and submit.
On the next screen, click "Transmit"
You're done.
