Generally, the ability to cancel an order after it has been placed depends on the specific policies of Horizonhobby.com. Typically, cancellation requests are accepted if the order has not yet been processed or shipped. It is important for customers to act quickly if they wish to cancel. In many cases, submitting a cancellation request can be done through their website, where there may be a dedicated section for order management. If the order has already been shipped, it may be necessary to initiate a return instead, following their return policy guidelines. For the most accurate information regarding order cancellations, it is advisable to consult the relevant section on Horizonhobby.com or check the order confirmation email for specific instructions.