A developerneeds to deliver a solution for taxation that supports multiple countries and a complex...

For a solution that requires handling complex tax calculations across multiple countries and jurisdictions, it's efficient to leveragethird-party tax services that specialize in this area. Implementing thesfdc_checkout.CartTaxCalculationsorsfdc_checkout.TaxCalculationsinterface to integrate with such a service ensures that tax calculations are accurate and up-to-date. Additionally, exploring the Salesforce AppExchange for packages or sample code can provide ready-made solutions or frameworks that can expedite the development process.