The Magento contacts page is a standalone module: Mage_Contacts, however unlike categories, CMS pages or products, when it comes to the contacts page you are pretty limited by what you can edit from the admin area. SEO meta tags are also not currently editable, so to add or edit them you will need to add the following layout updates to either the local.xml file, or the contacts.xml file if it exists in your theme
<action method="setTitle" translate="title" module="contacts"><title>CUSTOM TITLE</title></action>
<action method="setDescription" translate="description" module="contacts"><description>CUSTOM META DESCRIPTION</description></action>
<action method="setKeywords" translate="keywords" module="contacts"><keywords>CUSTOM META KEYWORDS</keywords></action>
Ideally it would be nice if we could have the same level of content management of the contacts page, as we do for any of the CMS pages; we could accomplish this by building a custom extension and extending the contacts module – I’ll cover how to do this in a future article.