Allows you to add a new tax rate for a Xero organisation.
Tax Rate Constraints
In order to properly complete tax forms, certain tax rates can only be used with certain account types. This will vary depending on the rate and country. Sending a line item with a tax rate that can't be use with the line's account code will generate the error "The TaxType code 'xxx' cannot be used with account code 'xxx'."
Authentication values used to connect to the Xero server.
Tax rate to create.
The tax rate created.