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  1. Taxation in the United States - Wikipedia

  2. United States - Individual - Taxes on personal income

  3. US Tax Data Explorer | Taxes in the United States

  4. Summary of the Latest Federal Income Tax Data, 2022 Update

  5. Data, Statistics and Reports on Taxes in the U.S. - USAFacts

  6. Statistics | Internal Revenue Service

  7. How do federal income tax rates work? | Tax Policy Center

  8. Income tax in the United States - Wikipedia

  9. Federal Income Tax - Investopedia