| Abbreviation | Definition |
|---|---|
| NT | Net Taxes |
| NT | no tax |
| NTA | National Tax Agency |
| NTCA | National Tax and Customs Administration |
| NTE | No Tax Effect |
| NTFO | Nationwide Tax Forums Online |
| NTL | No Tax Liability |
| NTLA | National Tax Lien Association |
| NTN | National Taxation Number |
| NTO | National Tax Office |
| NTO | Network of Tax Organisations |
| NTPI | National Tax Practice Institute |
| NTQ | Non Tax Qualified |
| NTR | Normal Tax Rate |
| NTRC | National Tax Research Center |
| NTRC | Notice of Tax Return Change |
| NTS | National Tax Search |
| NWT | Net Wealth Tax |
| OATC | Oregon Association of Tax Consultants |
| OCFT | Oil Company Franchise Tax |