Thank you for reply to me. I used this attribute and I can filter subtasks but the only problem is that I don’t know what task it belongs once I can have many subtasks with same title… anyway to add an attribute for specific task and then find a subtask?
The search API supports the same opt_fields parameter as our other endpoints, so you can use opt_fields=parent to include the parent task as a field on the tasks in the search result. This should help you distinguish the different matching subtasks.