[LorenPechtel]

Disagree. For such people the government will generally have everything on the income side. They won't necessarily have everything on the deduction side.

However, even partial data like that would be very useful. The IRS sends you pre-filled forms. You can change anything that's wrong, add anything that's missing. Do your taxes, or just submit the changes and let them deal with the rest of it and send you a bill if need be.

[kahnpro]

If you have things on the deduction side that the government doesn't already know about, you can submit a self-assessment or an amendment. Deductions themselves should be simplified.

You bring deductions up as if it's a problem but many other countries, like the UK, do it this way without problems.

Most people here do not submit tax returns.