Member States
The following states participate in the MTC Audit Program and are members of the MTC Audit Committee:
| State | Income Tax | Sales Tax |
| Alabama | X | X |
| Alaska | X | |
| Arkansas | X | X |
| Colorado | X | X |
| Delaware | X | |
| District of Columbia | X | X |
| Hawaii | X | X |
| Georgia | X | |
| Idaho | X | X |
| Iowa | X | X |
| Kansas | X | X |
| Kentucky | X | X |
| Louisiana | X | X |
| Maryland | X | X |
| Missouri | X | |
| Montana | X | |
| Nebraska | X | |
| New Jersey | X | X |
| New Hampshire | X | |
| New Mexico | X | |
| North Dakota | X | X |
| Oregon | X | |
| Pennsylvania | X | |
| Rhode Island | X | X |
| Tennessee | X | X |
| Utah | X | X |
| Vermont | X | |
| Washington | ||
| West Virginia | X |