Copy User Story to Create Epic

You can create an epic from a user story by copying the information from the user story into the epic. The values from the user story become the default values for the epic. You can change all the values for the epic except the product.

The user story becomes the child of the new epic by default. If the user story is already a child of another epic, it is delinked from the other epic and it is linked to the new epic.

Follow these steps:

Click Agile, and from Planning, click Backlog.
Select the product name from the Product drop-down list.
Click Details for the user story that you want to copy to an epic.
Click Copy to Epic, and edit the appropriate fields.
Save your changes.