In recent years, the IRS Criminal Investigation (CI) division and the Department of Justice (DOJ) have aggressively pursued tax professionals involved in fraud or other tax-related crimes. Certified tax planners, preparers, accountants, and attorneys who engage in misconduct are facing serious legal consequences. This article reviews notable prosecutions from roughly the past five years, highlighting enforcement trends and the types of fraud authorities have targeted. We then distill 10 key lessons from these cases – each supported by real-world examples and case citations – demonstrating how broad enforcement has impacted tax professionals. Finally, we conclude with a comprehensive list of dos and don'ts to help tax practitioners stay on the right side of the law and avoid the pitfalls that landed others in trouble.

State Tax Planning with the “80/20 Company” Exclusion
Many multinational groups find that foreign-source dividends and other income earned by domestic affiliates are fully or partially subject to state income taxation, even where the federal system provides an exemption. This state-level “leakage” can be material – particularly in high-tax jurisdictions – and is often overlooked because the income appears sheltered at the federal level. For groups with predominantly foreign operations, a starting structure or a restructuring that causes one or more domestic affiliates to qualify as an “80/20 company” can substantially reduce or eliminate state taxation on that income.


