In the USA the government also knows the money you make. They have all the data they need to be able to generate a pre-filled draft, and taxpayers could use that as a starting point and modify it if they needed to take a large tax credit for installing solar panels, or some other such thing which the government doesn't necessarily know about.
But it's against the law. The law specifically prohibits the tax agency (IRS) from providing pre-filled tax forms for taxpayers. Why? Who knows... I can't read the minds of Senate and House members! But I'd very confidently place a bet that it's entirely because of careful lobbying by the two companies (Intuit and H&R Block) who make large amounts of money off the current system.
But it's against the law. The law specifically prohibits the tax agency (IRS) from providing pre-filled tax forms for taxpayers. Why? Who knows... I can't read the minds of Senate and House members! But I'd very confidently place a bet that it's entirely because of careful lobbying by the two companies (Intuit and H&R Block) who make large amounts of money off the current system.
References:
https://www.vox.com/policy-and-politics/22596072/irs-turbota...
https://www.propublica.org/article/turbotax-just-tricked-you...