The Domestic Tax Unit of DRM is responsible for providing technical guidance on tax policy and administration in respect of domestic taxes such as Value Added Tax, Corporate Income Tax, Tobacco Tax, Personal Taxes, Property Taxes. The technical guidance is provided through capacity building programmes with countries, continental or regional training events and legislative support. The Domestic Tax Unit is also responsible for the development of ATAF products (such as Toolkits, Suggested Approaches, Guidelines) for providing the necessary legislative and administrative support to countries. 

ATAF in the new decade is committed to supporting African Tax Administrations to achieve meaningful automation and digitalisation of tax systems with a view to maximining the benefits of the modern technologies.  The Domestic Tax Unit is response for supporting in this strategic objective.

The Domestic Tax Unit also represents the African perspectives in the global tax policy debates and at the standard setting organisations such as the Organisation for Economic Cooperative and Development (OECD) and at the United Nations Tax Committee as well as in other multilateral fora.