At least 55 of the largest corporations in America paid no federal corporate income taxes in their most recent fiscal year despite enjoying substantial pretax profits in the United States. This continues a decades-long trend of corporate tax avoidance by the biggest U.S. corporations, and it appears to be the product of long-standing tax breaks preserved or expanded by the 2017 tax law as well as the CARES Act tax breaks enacted in the spring of 2020.