Knowledge base articles are managed in the admin site. Go to the admin site and select
the 'Knowledgebase' tab.

In order to add articles, at least one category should be configured with a topic added to it. Category is

the top-level of Knowledge base hierarchy and Topic is the second-level.

Articles can be added to topics only. Suppose category is: 'Phone' and the topic is: 'Technical Questions'.
once the category and its topic is set up, go to articles and select from the drop down box. Then
press 'add new article' button to create the article.