I've been saying this all along.

Would You Let the I.R.S. Prepare Your Taxes? - The New York Times

" Today, employers, banks, brokerage firms and pretty much every other financial organization in the country send the federal government detailed records about our economic activity every year. These organizations also send you, the taxpayer, a similar set of documents, which are forms with names like W2 and 1098. After you file your taxes, the government matches its two sets of documents to make sure you have filed correctly. 

To Mr. Bankman, this double documentation doesn’t make much sense. If the government is already collecting financial data from employers and banks, why can’t the I.R.S. use that information to precalculate our tax returns for us? At the very least, why can’t tax software just connect to the government’s database to download all the information that the government has collected, saving us all that record-keeping and data entry? "

I said it once, anyway.