| ADB | Asian Development Bank |
| AEAT | Agencia Estatal de Administración Tributaria (Spain) |
| AEOI | Automatic Exchange of Information |
| AFIP | Administración Federal de Ingresos Públicos (Argentina) |
| AI | Artificial Intelligence |
| AIAA | Algorithmic Impact and Alignment Assessment |
| APA | Advance Pricing Agreement |
| API | Application Programming Interface |
| AT | Autoridade Tributária e Aduaneira (Portugal) |
| ATO | Australian Taxation Office |
| AUD | Australian Dollar |
| BEPS | Base Erosion and Profit Shifting |
| CFD | Comprobante Fiscal Digital (Digital Fiscal Receipt) |
| CFDI | Comprobante Fiscal Digital por Internet (Digital Fiscal Receipt by Internet) |
| CIAT | Inter-American Center of Tax Administrations |
| CIT | Corporate Income Tax |
| COTS | Commercial-Off-The-Shelf |
| CRA | Canada Revenue Agency |
| CRS | Common Reporting Standard |
| CS | Customer Satisfaction |
| CVITP | Community Volunteer Income Tax Program |
| DDMP | Digital Document Management Program |
| DFA | Digital Financial Asset |
| DGFiP | Directorate Générale des Finances Publique (France) |
| DI | Digital Identity |
| DPN | Director Penalty Notice |
| ECP | Enterprise Client Profile |
| EDS | Electronic Declaration System |
| eIDAS | Electronic Identification Authentication and Trust Services |
| EUR | Euro |
| FATCA | Foreign Account Tax Compliance Act |
| FRI | Financial Resilience Insights |
| FTA | Forum on Tax Administration |
| FTE | Full Time Equivalent |
| GBP | Great Britain Pound |
| GDP | Gross Domestic Product |
| GRS | Georgia Revenue Service |
| HMRC | Her Majesty’s Revenue and Customs (United Kingdom) |
| HNWI | High Net Wealth Individual |
| HR | Human Resources |
| ICAP | International Compliance Assurance Programme |
| ICT | Information and Communication Technology |
| IMF | International Monetary Fund |
| IOTA | Intra-European Organisation of Tax Administrations |
| IR | Inland Revenue (New Zealand) |
| IRS | Internal Revenue Service (United States) |
| IRAS | Inland Revenue Authority of Singapore |
| IRIN | Inland Revenue Interactive Network |
| ISORA | International Survey on Revenue Administration |
| IT | Information Technology |
| ITA | Israel Tax Authority |
| ITDN | Intent to Disclose Notice |
| ITFA | Individual Tax Filling Assistance |
| ITTI | Inventory of Tax Technology Initiatives |
| KSeF | Krajowy System e-Faktur (National e-Invoice System) |
| LTO/P | Large Taxpayer Office/Programme |
| MAP | Mutual Agreement Procedure |
| MNE | Multinational Enterprise |
| MSP | Managed Service Provider |
| MTD | Making Tax Digital |
| NDID | National Digital Identity Platform (Thailand) |
| NTA | National Tax Agency (Japan) |
| NTA | Netherlands Tax Administration |
| NTCA | National Tax and Customs Administration (Hungary) |
| NZD | New Zealand Dollar |
| OECD | Organisation for Economic Co-operation and Development |
| PACO | Portal de Asistencia al Contribuyente (Portal for Integral Assistance to Taxpayers) |
| PAYE | Pay-As-You-Earn |
| PIT | Personal Income Tax |
| PMP | Platform for the Elderly and Pensioners |
| RA-FIT | Revenue Administration Fiscal Information Tool |
| RCT | Randomised Controlled Trials |
| RFB | Receita Federal do Brasil |
| RPA | Robotic Process Automation |
| RTR | Real-Time Risk |
| SAT | Servicio de Administración Tributaria (Mexico) |
| SEK | Swedish krona |
| SII | Servicio de Impuestos Internos (Chile) |
| SIG | Secure Internet Gateway |
| SME | Small and Medium-sized Enterprise |
| SMS | Short Message Service |
| SOC | Security Operation Centre |
| SRS | State Revenue Service (Latvia) |
| SSC | Social Security Contribution |
| SSTTP | Self-Serve Time to Pay |
| STA | State Taxation Administration (People’s Republic of China) |
| STA | Swedish Tax Administration |
| STI | State Tax Inspectorate (Lithuania) |
| TAS | Tax Administration Series |
| TIWB-CI | Tax Inspectors Without Borders for Criminal Investigation |
| TFTC | Task Force on Tax Crimes and Other Crimes |
| TRD | Thailand Revenue Department |
| UK | United Kingdom |
| UNDP | United Nations Development Programme |
| US | United States |
| VAT | Value Added Tax |
| WHT | Withholding Tax |
Tax Administration 2023
Comparative Information on OECD and other Advanced and Emerging Economies