Tax expenditures are defined by the Joint Committee on Taxation (JCT) as “revenue losses attributable to provisions of the Federal tax laws which allow a special exclusion, exemption, or deduction from gross income or which provide a special credit, a preferentialrate of tax, or a deferral of tax liability.” | Tax expenditures are defined by the Joint Committee on Taxation (JCT) as “revenue losses attributable to provisions of the Federal tax laws which allow a special exclusion, exemption, or deduction from gross income or which provide a special credit, a preferentialrate of tax, or a deferral of tax liability.” |