| Abbreviation | Definition |
|---|---|
| CMVT | Commercial Motor Vehicle Tax |
| CNIT | Corporate Net Income Tax |
| COAST | Coalition Opposed to Additional Spending and Taxes |
| CPTD | Certificate of Pay and Tax Deducted |
| CPTM | Commercial Property Tax Management |
| CPTS | CrossLink Professional Tax Solutions |
| CRT | Commercial Rent Tax |
| CRTP | CTEC Registered tax preparer |
| CRTR | Community Renewal Tax Relief |
| CSED | Collection Statute Expiration Date |
| CSFT | Capital Stock and Franchise Tax |
| CSTC | California Society Of Tax Consultants |
| CSTR | Center for Strategic Tax Reform |
| CT | Carbon Tax |
| CT | Corporation Tax |
| CTA | Chartered Tax Advisers |
| CTA | Corporate Tax Advisors |
| CTACS | Canadian Tax and Credit Simulator |
| CTAM | Carbon Tax Assessment Model |
| CTB | Council Tax Benefit |