Oh dear, I'm sorry to hear that. Have you made sure that your physical presence is accurate? There's more on that in our guide on US taxes - if that doesn't help out, I'd be happy to look into this more closely. To do that I'll just need a closer look at your settings and that test product - what I'll do is send you off an email once I've posted this response. Reach back out to me at that email, and I'll dig into this for you!