Intuit is overhauling their legacy engineering practices by implementing an "innersource" program inspired by open source practices. They established unified guidelines, set teams up for success by appointing trusted committers and defining review SLAs. They are also scaling the effort by establishing technical community leaders and prioritizing foundational capabilities. Getting started involves connecting with leaders, researching standards, identifying model teams, and conducting workshops to teach the new practices. Roles like engineers, product managers, and data analysts are needed, along with tooling like an internal contributions site and rewards program. The benefits include empowered and engaged engineers, decreased wait times, higher quality products, and faster fixes for customers.