The Cohan rule is named for George M. Cohan. George Michael Cohan (1878 – 1942) was a theatrical producer. In the decade before World War I, he was called the “man who owned Broadway” and is considered the father of American musical comedy. In 1940 he was awarded the Congressional Gold Medal for his contribution to morale during World War I with his songs “You’re a Grand Old Flag” and “Over There,” the first time the medal was awarded to someone in an artistic field. But his most enduring legacy may be the tax rule that shared its name.

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.


