"...The CBO’s projections came with a caveat. It said the lack of detail the White House has provided about its plans – primarily its plan to overhaul the tax code – made it difficult for the agency to determine what the economic impact of these ideas would be. The White House has put out only a sparse, one-page blueprint for overhauling the tax code..."

Garbage in / garbage out

Why did the CBO even come up with projections based on nothing but a one page blueprint?   Their assessments are usually based on a static economic model which does not factor in the true growth that an expanding economy creates.  I remember that the CBO had to come out after their Obamacare projections and clarify that it was totally based on congressional numbers that they were forced to use. They said that the numbers provided were not certain and though the model was accurate, the real world enactment of The ACA would differ sharply.  Indeed, "...They were off by over 100%...".   garbage in / garbage out