Standard deduction amount for single, married, and head of household filers.

Number of households, average pretax and after-tax income, shares of pretax and after-tax income, for nonelderly childless households, by comprehensive household income quintile.

Number of households, average pretax and after-tax income, shares of pretax and after-tax income, and income category minimums for all households, by comprehensive household income quintile.

Shares of federal tax liabilities for all households, by comprehensive household income quintile.

Number of households, average pretax and after-tax income, shares of pretax and after-tax income, and income category minimums for households with children, by comprehensive household income quintile.

Shares of federal tax liabilities for elderly headed households, by comprehensive household income quintile.

Average federal tax rates for nonelderly childless households, by comprehensive household income quintile.

Marginal tax rate and each rate at which the tax is computed.

Adjusted gross income, exemptions, deductions, and tax items.

Income limits and mean income for each quintile of household income, 1967 through 2018.

Historical itemized charitable contributions as total amount (constant dollars), percent of AGI, and percent of GDP, 1917-2017.

Historical percentage of individual income tax returns, classified by the highest applicable statutory marginal rate, 1958-2016.