Inca Clinic provides powerful customization abilities which allow you to change things such tabs, field layouts1) and so on. You can:
Pressing the + button located to the right of the last tab allows you change what tabs appear and their order. This also gives you access to all of the hidden tabs, even those that you don't choose to list as visible tabs that appear on the top of most Inca Clinic pages.
You can click on the tab that you want to use, or you can click 'Customize My Tabs' to add, remove and reorder your tabs: