| Abbreviation | Definition |
|---|---|
| AITN | ASEAN Investment Tax News |
| AITR | Annual Income Tax Return |
| ALE | Applicable Large Employer |
| AMT | Alternate Minimum Tax |
| AMT | Alternative Minimun Tax |
| AOA | Authorised OECD Approach |
| AOP | Association of Person |
| AOT | Administrative Office Tax |
| AOTC | American Opportunity Tax Credit |
| APCTD | Andhra Pradesh Commercial Tax Department |
| APS | Automatic Payroll Systems |
| APTB | Asia Pacific Tax Bulletin |
| APTC | Advance Premium Tax Credit |
| APTC | advance premium tax credits |
| APTC | Advanced Premium Tax Credit |
| APTC | Advanced Premium Tax Credits |
| APTF | Asia Pacific Tax Forum |
| ARPT | Annual Residential Property Tax |
| ASTPS | American Society of Tax Problem Solvers |
| ASTRO | Advisor Strategy and Tax Return Optimization |