Whether you are taking auditing classes in CPA or becoming a certified internal auditor soon, you can hire an auditing tutor for understanding everything from Sarbanes Oxley act requirements to public company accounting oversight board (PCAOB) rules to form an unqualified audit opinion. You can ask questions from tutors about whether internal control over financial reporting are based on COSO framework and whether audited financial statements are prepared based on generally accepted accounting principles or GAAP.