Inclusive Access makes the material accessible on your account on or before the first day of class. Depending on your school and course, there are different ways to go about maintaining, obtaining, or declining this access:
With this model, you start the term with the material. If your course is "opt-out Inclusive Access," that means you would need to "OPT OUT" if you got the materials elsewhere and don't want them through this program. You have a trial period of free access prior to the add/drop deadline - after the deadline, you will be charged for access to the materials for the duration of the term unless you opt out.
With this model, you start the term without the material. If your course is "opt-in Inclusive Access," you'll have to go to your LMS or your school's RedShelf website to "OPT IN" for access to the materials. You will not have access and will not be charged unless you decide to opt in. You have the option to opt in until your course's add/drop deadline.
If you don't have an option to opt in or opt out, that means you're opted in by default, and your school bookstore - not RedShelf - is the gatekeeper for opt outs. You'd need to contact them for information about a potential opt-out.
Please note your "opted in" or "opted out" status becomes permanent when the add/drop deadline passes. Your school bookstore or bursar's office handles final billing, so they can answer questions about a potential late opt-out for any extenuating circumstances.