On the left of the main page in the little box, underneath where all of the various links (applications, SAP, mySupport, etc) are. There's three options: store reports, myPerformance, and one called store fact sheet or something, which is the one you want. Just type in your store number and the org chart appears in one of the boxes at the top.
EDIT: that just gets you the org chart number. If you want the chart that shows you how many ETLs and TLs you have, that one is under store reports.