No client’s ever happy about having to pay state income tax in addition to federal, but at least in the past that chore was straightforward: Make money in a state, probably the one where you live and work, and you owe tax on what you made if that state has an income tax. Enter the computer and the fax machine, later the modem, email and Zoom. Then enter the pandemic and widespread remote work from home that’s largely lingered after Covid faded. Cap it off with the new maneuver of moving from a high-tax state to a low-tax one but not completely severing all former work and life connections. It is any surprise, really, that states would try to squeeze tax revenue out of that using regulations still unchanged from the past? And for punishing what that state suddenly thinks are tax cheats? Do you have a client a state might be interested in? How many states? And how do you actually know?

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.


