Webcanceling a vaccine appointment at cvs is a relatively straightforward process. Here are the steps to follow: Log in to your cvs. To cancel your vaccine appointment at cvs online, follow these steps: Log in to your cvs account: Go to the cvs website and log in. Go to the cvs website (www. cvs. com) and log in to your account. Locate your vaccine appointment in your account dashboard. Webi got an appointment for sunday april 18, but due to school work i need to cancel it and reschedule it. I've been looking at the cvs website but i can't find how to cancel it. Webyou can cancel your visit for any reason.