The 1040 form is used by U.S. taxpayers to file an annual income tax return. Hence, it is used to collect federal tax.
The U.S. federal income tax is a marginal tax rate system based on an individual's income and filing status. For the 2021 and 2022 tax years, the tax brackets are:
Therefore, the 1040 form is used for the collection of the federal tax.
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