Schedule an issue as Epic child

Make an issue to be linked to an Epic 

1. When addind/editing Recurring Task
2. Set value of the field Epic link

3. Save a recurring task
   
   

   "Epic link" field has to be selected on CREATE_ISSUE screen to be visible on recurring task add/edit dialog

Check if an issue has been linked to the epic

Simply go to the epic set in field Epic link and check epic linked issues