The tax preparation industry exists in much of the world.
Taxes are simple if you live in one place and only receive income from your employer. If you have multiple sources of income, connections to multiple countries, etc., things can get very complicated very fast. That's why the tax prep industry exists - and not just in the US.
That being said, the Internal Revenue Service could prepare the taxes of most Americans. A simple system of, "Here's what we think you owe, based on the information we have on hand - sign and submit if you agree" would work for most people.
Taxes are simple if you live in one place and only receive income from your employer. If you have multiple sources of income, connections to multiple countries, etc., things can get very complicated very fast. That's why the tax prep industry exists - and not just in the US.
That being said, the Internal Revenue Service could prepare the taxes of most Americans. A simple system of, "Here's what we think you owe, based on the information we have on hand - sign and submit if you agree" would work for most people.