My nexus is 6.75% bit it is showing and calculating 6.25%.
When I look at the drop down, it shows:
Frio County (TX)
I added a TEST item to my cart, selected shipping to my address and get this:
The taxes are wrong! Someone help please!
My name is Alex, I'm a guru here at Shopify!
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!
Do let me know, and you can always give us a call or start a live chat at any time. We're open 24/7 for your convenience and always happy to assist!
Alex | Shopify Guru