Just in case you are hunting and pecking for reports for TAMeB using Tivoli Common Reporting, I assume you've seen the documentation for auditing TAMeB. It's only 500+ pages. :-)
The basic idea is that you will first install Tivoli Common Reporting (integrated in the WebSphere Integrated System Console). Then you need to download the reports from the support web site. Why they don't simply include these with TAM is a mystery. Oh and good luck finding them by searching reports, or audit reports, etc.... If you search for "Operational Reports" you will find them. Go figure.
Anyhow the link to the reports: