Here you can modify the existing COGS list. The COGS structure has 4 levels. You can select the COGS Level from the dropdown and click on New to add a new level. You will get a popup where you can update the Level Code, Name and Description. You can update Level 2, 3 and 4 the same way.
You can also update the COGS list via an Excel Upload template. Once a revision of COGS is created in any project, then this COGS list cannot be modified. However, if you still need to modify it, you can contact the Atlas support team.