Access your account through the "My Account" link in the top right corner of your dashboard. Click the "Manage Locations and Competitors" link on the left. Choose a location and click the "Pencil Icon For The Location" button to the far right of the location. Scroll to the bottom of the page to find "Additional Keyword Tracking". Here you can edit keywords and local areas associated with that location. Once completed, be sure to click "Save Changes" at the bottom of the page.