For this guide, it’s important to note that this tax information is relevant to Americans specifically. They’re what’s known as a social casinos and are available in the US and Canada. Consider this a mini Chumba Casino review for some tax context. Conclusion: What tax do you owe on Chumba Casino winningsīefore we understand any Chumba Casino tax form information, we first need to understand the basics of what they’re all about.What does Chumba Casino say about taxes?.Tax context: Understanding Chumba Casino.