Task business data can be shared between tasks queued from different task types, as long as they have identical business data (for example, the task data in each task has been created from the same IS document type).
You can configure your parent and child tasks to keep business data synchronized between them. You can do this by creating a task event that incorporates one of the available "Set Business Data" actions. For more information, see
Synchronizing Parent-Child Task
Business Data.