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.

Small Mistakes With Huge Costs for Your Client’s Tax Returns
We’ve all been there. A client walks into your office and, somewhere in the conversation, you realize that a seemingly minor oversight, a missed deadline, a form nobody filed, an election nobody mentioned, has spiraled into a five- or six-figure tax problem. In my years of practice, some of the most expensive mistakes I’ve seen weren’t the result of aggressive planning gone wrong. They were small, quiet errors. The kind that happens when a deadline slips, an election isn’t made, or a form gets overlooked entirely. The tax code is unforgiving in these situations, and the IRS has little sympathy for “I didn’t know.” This article walks through some of the most common, and most costly, small mistakes that can devastate your client’s tax situation, along with practical guidance for avoiding them.


