Take a look at this article if you are interested in a Tax LLM...
Caron, Paul L. and Kowal, Jennifer M. and Pratt, Katherine, Pursuing a Tax LLM Degree: Why and When? (March 24, 2010). U of Cincinnati Public Law Research Paper No. 10-11; Loyola-LA Legal Studies Paper No. 2010-9. Available at SSRN: http://ssrn.com/abstract=1577966 or http://dx.doi.org/10.2139/ssrn.1577966
Caron, Paul L. and Kowal, Jennifer M. and Pratt, Katherine, Pursuing a Tax LLM Degree: Why and When? (March 24, 2010). U of Cincinnati Public Law Research Paper No. 10-11; Loyola-LA Legal Studies Paper No. 2010-9. Available at SSRN: http://ssrn.com/abstract=1577966 or http://dx.doi.org/10.2139/ssrn.1577966