> The IRS can already calculate your taxes for you
Only if 100% of your income is reported to the IRS. Small amounts (under $600) often aren't, and while you might be able to get away with not reporting it, its obviously not legal. I had some slightly unusual small sources of income the past couple of years that I had to keep records of, report, and pay taxes on.
Granted, a lot of people arent going to have much more than a W2 and maybe some interest income.
Only if 100% of your income is reported to the IRS. Small amounts (under $600) often aren't, and while you might be able to get away with not reporting it, its obviously not legal. I had some slightly unusual small sources of income the past couple of years that I had to keep records of, report, and pay taxes on.
Granted, a lot of people arent going to have much more than a W2 and maybe some interest income.