Common tax abbreviations 

Abbreviation Term
AMT alternative minimum tax
APA advance pricing agreement
BEPS base erosion and profit shifting
CARICOM Caribbean Community
CEEAC Economic Community of Central African States
CEMAC Economic and Monetary Community of Central Africa
CEN-SAD Community of Sahel-Saharan States
CFC controlled foreign company
CGT capital gains tax
CIF cost, insurance, and freight
CIT corporate income tax
CRS Common Reporting Standard
DTA double taxation agreement
DTT double taxation treaty
EAEU Eurasian Economic Union
ECO Economic Cooperation Organization
EEA European Economic Area
EFTA European Free Trade Association (or Area in a broader sense)
EORI Economic Operator Registration and Identification Number
FATCA Foreign Account Tax Compliance Act
FIFO first in first out
FOB freight on board / free on board
G20 Group of Twenty
GAAP Generally Accepted Accounting Principles
GAAR general anti-abuse rule / general anti-avoidance rule
GDP gross domestic product
GST goods and services tax
IFRS International Financial Reporting Standards
IGA intergovernmental agreement
IMF International Monetary Fund
ITC investment tax credit
LIFO last in first out
NATO North Atlantic Treaty Organization
NGO non-governmental organisation
NPO non-profit organisation
NWT net wealth/worth tax
OECD Organisation for Economic Co-operation and Development
OHADA Organisation for the Harmonisation of Business Law in Africa
OIC Organisation of the Islamic Conference
OSCE Organization for Security and Co-operation in Europe
PAYE pay-as-you-earn
PE permanent establishment
PIT personal income tax
PPP purchasing power parity
R&D research and development
TIEA tax information exchange agreement
UN United Nations
UNESCO United Nations Educational, Scientific, and Cultural Organization
VAT value-added tax
WHO World Health Organization
WHT withholding tax
WIPO World Intellectual Property Organization
WTO World Trade Organization