I Have been in Canad as a visitor since 4 months ago and I want to extend my stay for more than 6 months. I have filled the form IMM5708e and other forms to apply for an extension for my stay in Canada but, I don't know where I should upload the forms and documents. When I sign in to my account, there are only 3 types of applications such as temporary resident visa, study permit, and work permit, but neither of them suits my request. what should I do?