I have a $10 product
Subtotal is coming up as $10.58
Everything is taxable goods, and that is being added later
I'm not sure what is causing the subtotal of the $10 item to be $10.58 though?

Products Shipping Weight: 1

Using Zone Based Rates
Enable Zones Method
True

Calculation Method
Weight

Tax Class
Taxable Goods

Tax Basis
Store