The fiscal cliff deal enacted new tax legislation, preserving Bush-era tax cuts for 98% of taxpayers while introducing significant tax hikes for high earners, specifically increasing the top marginal tax rate to 39.6% for individuals above $400,000. The deal reinstates the payroll tax rate to 6.2% and restructures several tax credits, including the EITC and educational credits, which will be extended through 2017. Additional provisions affect dividends, capital gains taxes, and include measures like maintaining long-term unemployment benefits and certain tax breaks for businesses.