As QaTraq evolves, and as more functionality is added, the User Guides evolve too. So depending on which version of QaTraq you are using you should refer to the User Guide which matches the release you are using.
As QaTraq evolves in stages you will find below two user guides for each of the last two stages of development. If you find you need information above and beyond the user guide then the design documents are the place to look.
To find out which version of QaTraq you are using load the index page for your installation of QaTraq and look for the version/release identifier in the 'Welcome' box.