Current Publications
| Colorado - IFTA and IRP Recordkeeping and Audit Information - Excise 10 |
| International Fuel Tax Agreement (IFTA) - Excise 8 |
| Passenger Mile Tax - Excise 14 |
| Penalties and Interest - General 11 |
| Colorado - IFTA and IRP Recordkeeping and Audit Information - Excise 10 |
| International Fuel Tax Agreement (IFTA) - Excise 8 |
| Passenger Mile Tax - Excise 14 |
| Penalties and Interest - General 11 |