Anujan Mathisekaran updated the Romania VAT rate from 19% to 21% in the Shopify/worldwide repository to ensure compliance with new regulatory requirements. Focusing on configuration management and internationalization, Anujan localized the change to YAML configuration files and used Ruby for safe, config-only deployment. The update was versioned in a dedicated commit to maintain traceability and minimize risk to core pricing and checkout systems. By isolating the change and maintaining repository hygiene, Anujan enabled compliant tax calculations for Romanian storefronts, reduced audit exposure, and preserved checkout stability, demonstrating disciplined version control and a careful approach to regulatory mapping and localization.