Earlier quoted context omitted.
If your New York business sells something to someone in Oklahoma, you don't have to charge NY sales tax. That's not controversial or a grey area (edit: until 2018). I don't know exactly how they structured this transaction, but if it ended up in Oklahoma it seems to be within the spirit of the law.
> If your New York business sells something to someone in Oklahoma, you don't have to charge NY sales tax Are you sure about that? It seems that at least online businesses don't work that way.[1] 1. https://turbotax.intuit.com/tax-tips/self-employment-taxes/s...
> If your business has a physical presence, or “nexus”, in a state, you must collect applicable sales taxes from online customers in that state.
> If you do not have a physical presence, you generally do not have to collect sales tax for online sales. However, in June of 2018, the U.S. Supreme Court issued a ruling that will likely change this exemption to collecting sales tax.