News broke last week that auction house Christie’s had agreed to pay a $16.7 million fine to the Manhattan District Attorney for failing to collect sales tax between 2013 and 2017. This was surprising in many ways, but a reminder of the lurking dangers of sales and use tax in multi-state and international art transactions. While the variables can seem daunting, the decision-tree of how to account for sales and use tax need not be overly complicated. The Christie’s settlement is an opportunity to review the rules of the road.