Pre-filled tax forms

Here's a neat idea. A pre-filled tax return with the income information that the government already has. Makes alot of sense to me - seems that a big portion of the work of creating a tax return is transferring data from paper forms that the govt. already has regarding income. Data here says in a test run in California it's far cheaper to process than how it's currently done.

Politically this is a tough go though - as tax return is big business - and making it easier to file reduces the money the tax preperation business could earn on the "easy" returns.

Anyhow, I thought this was a good idea: Why Can’t the I.R.S. Help Fill in the Blanks?