The focal Public Administration in this architecture is a Tax Administration that is aiming to develop TA 3.0 Capabilities. This requires a digital transformation as described in the vision that is laid out in document: OECD (2020), Tax Administration 3.0: The Digital Transformation of Tax Administration, OECD, Paris. http://www.oecd.org/tax/forum-on-tax-administration/publications-and-products/tax-administration-3-0-the-digital-transformation-of-tax-administration.htm