I'm using After Effects about a month in monthly plan. When the month is over I want to stop using it. If I don't cancel my plan is my credit card going to be charged for another month? In other words should I cancel the plan or do nothing and my credit card is not going to be charged and I cannot use the program anymore?
Cancellation policies require to cancel ten days before the end of the month. Check the fineprint on the respective pages. As to how and when your credit card is charged is nothing anyone here can answer. You have to contact sales support directly via web chat, e-mail or Twitter @AdobeCare.
Been awhile but I'm pretty sure the terms are something like: "You will be billed each month until you cancel..." That's pretty standard for most subscription services. I don't see why it would be any different for Adobe.