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What is the name of the birth defect in which the neural tube fails to close completely?
Federal Income Tax
An annual fee collected by the United States federal government from individuals, corporations, trusts, and other legal entities' earnings.
Average Tax Rate
The ratio of the total amount of taxes paid to the total tax base (income, expenditure, or asset), representing the overall burden of the tax.
Marginal Tax Rate
The rate at which the next dollar of taxable income would be taxed, relevant in progressive tax systems where tax rates increase as income increases.
Federal Income Tax
An annual income tax imposed by the US federal government on individuals, corporations, trusts, and various legal entities.
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