You can find new cannabis dispensaries or head shops on every corner in my neighborhood. But purchase and sale of marijuana has not been legalized on the federal level. What’s an ethical tax professional to do, when your client walks in with the news that they’ve started a cannabis business in your state? Read on to find out!

Kwong v. United States: A Pandemic-Era Decision That Could Reshape Tax Deadlines, Penalties, and Refund Opportunities
The 2025 court decision, Kwong v. United States, is quietly gaining traction among tax professionals for exactly these reasons. Its implications could be far-reaching, potentially opening the door to refund claims, penalty abatements, and revived tax deadlines that many assumed were long closed. But there’s a catch: the opportunity to act may be time-sensitive, and the window to preserve claims could begin closing in just a few short weeks. Here’s what the court actually decided and why it matters now.


