Final answer:
In the United States, income taxes are mandatory on wages, tips, and investment earnings.
Explanation:
Income taxes are required to be paid in the United States on wages, tips, and investment earnings. Individuals are taxed based on the income they earn throughout the year.
Wages are the money earned for work done, tips are additional income received, and investment earnings are profits gained from investments such as stocks, bonds, or real estate.
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