By default Magento does not have a Home Link in the top menu. If you have just created your Magento site with the sample data provided on the Magento site, you would have something similar to:
As you can see, there is no Home Link in the top menu. To go back to the Home page, a user is expected to click on the store logo which is something that a lot of users will not realise. Magento does not provide a method through which you can add a Home Link to your navigation menu using the Admin Panel.
So how can you add a Home Link to the top menu?
In order to add the Home Link to the top menu, open app/design/frontend/[your-theme]/default/template/page/html/topmenu.phtml. After Line 37 of this file which should read:
<li class="home"> <a href="<?php echo $this->getUrl(''); ?>"> Home </a> </li>
If you want to add an icon for the Home Link instead of text, you can accomplish that by:
where HOME_ICON_NAME is the name of the icon you want to use and it has been uploaded to skin/frontend/[your-theme]/default/images.