The Center on Budget and Policy Priorities has released Administration Proposals to Hide Tax-Cut Costs, by Joel Friedman & Robert Greenstein.  Here is the opening:

The President’s 2007 budget includes two proposals that risk corrupting federal budget rules in order to facilitate passage of Administration tax cuts. One proposal calls on Congress to adopt a new scoring convention that would make the cost of extending the 2001 and 2003 tax cuts disappear; under this proposal, legislation to make these tax cuts permanent would be officially “scored” as having zero cost. The other proposal would promote a dubious technique for assessing tax policy changes that, depending on the assumptions used, could be used to manufacture cost estimates showing various tax-cut proposals as having little or no cost.