The purpose of this paper is to examine the revenue impacts of the various government tax reform proposals in 2008-2009. Firstly, 'base-year' scoring more accurately indicates foregone revenue loss due to tax proposal than 'year to year' scoring. Secondly, we estimate the revenue impacts of government's tax reform proposals in 2008-2009 that include various tax cuts for five-year budget window. Lastly, this report suggests that the government’s number underestimates the cost of the proposal by 70 percent.