Average effective tax rates, number of tax returns, total adjusted gross income, and total tax after credits, for highest AGI groups, 1945 to 2020.

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

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

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

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

Average federal tax rates for households with children, by comprehensive household income quintile.

Average federal tax rates for elderly headed households, by comprehensive household income quintile.

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