As a scrum master, I'd like to break stories down into tasks we can track during the sprint >> Try creating a task by clicking the Sub-Tasks tab in the Detail View on the right

Task Breakdown

Many teams choose to break down user stories into a set of tasks needed to implement the story. They then update the status of these tasks during a sprint to track progress. The completion of the last task signals the end of the story.

You can add sub-tasks to a story on the sub-task tab (folder icon) above.