Tax services enable the tax calculation on invoices in Work 365. Within Tax services, there are two standard methods for tax calculation which are the Rate-Based Tax & No Tax Calculation.
Rate-Based Tax Service enable users to calculate tax based on pre-defined tax rates from the system.
No tax Calculation as the name suggests does not do any calculation and shall be useful in cases where certain customer invoices are not taxable and users can overwrite the same.
Tax categories are ways to classify the product catalog based on a specific tax rate. It can be based on the region your business operates. They can be defined based on a specific tax rate and then associate them with relevant products or services.