You can either put them in the blurb box or as part of your links list. The links list limits you to about 25 links, I think, which should be more than enough if you're only listing the basics - you can separate tags from other links with a subheading - but if you need a lot you're probably better off using the blurb.

The links list is located on the first page (basics) of the customize journal page - second box under journal title box - then just pop the tag jenny/ziva in the top box and the link underneath http://community.livejournal.com/ncis_femslash/tag/jenny/ziva for example.