"For tickets or food and beverage items purchased on our website or mobile app, you can receive a refund before the printed showtime. You can request this refund online, through the Tickets section on your AMC Stubs account or your confirmation email. Convenience fees cannot be refunded. For tickets or food and beverage items purchased at one of our theatres, you will need to visit the location prior to the printed showtime." https://www.amctheatres.com/faqs/tickets-and-passes/ticketing/can-i-refund-my-tickets
Take it to the box office beforehand.
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