Can I set custom tax rates for customers?

We will always tax customers based on their location, more specific taxing rules would need to be setup and controlled through a direct integration to Avalara. Please see our documentation page below if you would like to find more information around this feature:

At this time, within Recurly there is no way to customize the tax rate used for a specific customer. You may want to mark this customer as tax exempt, then manually create a charge adjustment to cover for the taxable amount owed. If the charge adjustment is left uninvoiced on the account, it will automatically roll into the next subscription billing that occurs.