Pccdepot.com generally processes orders quickly to ensure timely delivery. As a result, it may not be possible to add items to an existing order once it has been placed. If a customer realizes they need additional items, they typically need to place a new order for those items separately. It is advisable to review the order confirmation email for any specific details regarding order modifications. Additionally, customers may want to check the current webpage for any additional instructions or specific policies regarding order changes. If there are any unique circumstances or further inquiries, contacting customer support may provide clarity on options that may be available.