The Public Company Accounting Oversight Board (PCAOB) on Nov. 1 issued its 2020 annual inspection reports for the largest U.S. audit firms, including each of the Big Four, BDO, and Grant Thornton.

Maria L. Murphy, CPA, is a regular contributor to Compliance Week. She is a senior content management analyst, accounting and auditing products, CCH tax and accounting North America for Wolters Kluwer....