Presents various options to improve tax compliance & reform tax expend. Describes a number of proposals that would reduce the size of the tax gap by curtailing tax shelters, closing unintended loopholes, & addressing other areas of noncompliance in present law. Contains proposals that would reform certain tax expend. Each proposal includes a description of present law, reasons for change, a description of the proposed change & effective date, & a discussion of the issues raised by the proposal. Covers: tax procedure & admin.; individ. income tax; employment taxes; pension & employee benefits; corp. & partnership prov.; internat. prov.; other bus. prov.; exempt org.; tax-exempt bond prov.; excise taxes; & estate & gift taxation. Charts & tables.