Tax Practice Ethics and Professional Standards

Circular 230, preparer duties, SSTS, penalty exposure, and independence standards for REG.

This chapter covers the standards that govern how tax practitioners advise clients, prepare returns, and respond to uncertainty or error. REG questions here usually turn on duties, disclosure, and penalty exposure rather than on lengthy computation.

In This Chapter

How to Use This Chapter

  • Read this chapter when ethics questions are missed because the duty owed is being confused with the tax rule itself.
  • Focus on what triggers practitioner responsibility, disclosure, or penalty exposure.
  • Revisit these sections when reviewing error correction, unreasonable positions, or client-pressure fact patterns.

In this section

Revised on Friday, April 24, 2026