In recent years, the prevalence of illegal or “abusive” tax shelters (ATS) has increased dramatically. These ATS transactions have resulted in very substantial revenue losses in California. Despite the success of an amnesty program (known as the voluntary compliance initiative program), the problems posed by ATSs have not been fully resolved. In fact, it is likely that ATSs will continue to pose tax-related policy issues for the state. Given this, it will be important that the Legislature stay on top of the ATS situation. As one approach to accomplishing this, it may want to periodically review FTB’s ATS-related activities, including how well it is allocating its budgeted resources to get the best return on ATS activities and informing the Legislature about programmatic changes that will help address the ATS problem. (Prepared in accordance with Chapter 654, Statutes of 2003 (AB 1601, Frommer), and Chapter 656, Statutes of 2003 (SB 614, Cedillo).)