First is to Visit this link below
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/account.html
Sign in to your IRCC secure account - Canada.ca
Second is to input your user name and password
Then Click on Continue
Select I accept Terms and conditions and input security Questions
Review answers and continue
and Continue
then at the Bottom of the Form - click PAY
and NEXT
and Transmit and Pay