If you have Shopkeeper admin privileges, you will see an additional panel on your Player Dashboard called Owned Shops. This panel will list all your player-owned shops for quick and easy access.
Click the name of the shop to visit the shop front. You will see the shop owner (one of your characters) listed below the name. The chest icon to the right will be gray if your shop till is empty, and green if you have funds waiting for you. Click the icon to go right to your shop till to withdraw your funds or check the purchase log.