See this report at https ://www.irs.gov/statistics/soi-tax-stats-irs-data-book Also the chart show business tax decline while the rest are growing. Highlights of this year's Data Book During Fiscal Year (FY) 2018, the IRS collected nearly $3.5 trillion, processed more than 250 million tax returns and other forms, and issued almost $464 billion in tax refunds. In FY 2018, close to 58 million taxpayers were assisted by calling or visiting an IRS office. The use of IRS website, IRS.gov, continued to grow with almost 608.8 million visits. Of the taxpayers who participated in the 2018 Comprehensive Taxpayer Attitude Survey (CTAS), 85 percent said it is not at all acceptable to cheat on their income taxes, and nearly all (95 percent) believe it is a civic duty to pay their fair share of taxes. Additionally, most taxpayers (80 percent) are satisfied with their personal interactions with IRS. See the 2018 CTAS report (PDF) .