A joint initiative between the OECD and the United Nations Development Programme continues to make great progress, according to the Tax Inspectors Without Borders (TIWB) Annual Report. The TIWB initiative has been running for over nine years now, resulting in over US$6.05 billion in additional tax assessments in developing countries worldwide. The TIWB initiative assists tax authorities in developing countries build capacity by providing practical, hands-on assistance auditing multinational enterprises.