How to show the COGS Account on the Customer GL Accounts tab

Under the GL Account tab, the COGS Account does not show up.  However, in the customization fields list, it is there, along with the all the fields that DO show up.  I can’t find anything different in the settings for that field than the others.  How do i get the COGS account field to display on the tab?  I’m new at this  and somewhat lost, even after watching videos, because what is shown in the videos does not seem to work for this.  Thanks for any help