1. Check your order: First, you need to check your order to make sure that the food you ordered does contain the missing item. If you are not sure, ask a KFC clerk or check the order history.

2. Contact the KFC associate: If you are sure that the item is missing, you can contact the KFC associate. You can ask the clerk if the missing item can be replaced or ask the clerk how to handle the issue.

3. Seek help from your supervisor: If the KFC clerk is unable to resolve the issue, you can seek help from your supervisor. You can contact KFC Customer Service to report the issue to them and ask for their assistance in resolving it.

4. Leave contact information: When asking for help, make sure you leave your contact information so that a KFC associate or Customer Service can get in touch with you and resolve the issue.

In short, if you come back from packing at KFC and realize that one thing is missing, you can take the above steps to fix the problem.