If the package has not yet been picked up by the carrier, then the ReturnTag request can be deleted using the DeleteTagRequest process method of the Ship WSDL. In addition to the standard AuthenticationDetail and ClientDetail elements required for all services, the following element is required for a DeleteTagRequest:

Element Description
DeleteTagRequest/ ConfirmationNumber This number is returned in the DeleteTagReply. To identify the Tag request you want to delete, this number must be included.
DeleteTagRequest/ DispatchDate Specify the appropriate date.