The process to delete orders, invoices, credit memos, and shipments
is
the exact same:
1. Go to Sales → select what you would like to delete
2. Select the item(s) that you would like to delete
3. Check the action “Delete selected [items(s)]”
4. Click the “Submit” button and confirm your intention to delete
5. Item[s] will be deleted. Related credit memos, invoices and shipments will be deleted as well (can be configured)
6. You can also delete an item when viewing it individually
