Thread:Extension talk:Header Tabs/SMW FACTBOX/reply (3)

It depends on what version of MediaWiki you're using - if you have MW 1.16 or lower, then I think the factbox will show up automatically in a tab called "Factbox". If you have 1.17 or higher, then unfortunately I don't think you can get the factbox to show up in a tab, even if you try to do it manually.