Sales Tax Exemption
| State | Duration Valid | Uniform Form |
| Alabama | 3 Years | ✓ |
| Alaska | NA* | |
| Arizona | 4 Years | ✓ |
| Arkansas | 3 Years | ✓ |
| California | 3 Years | ✓ |
| Colorado | 3 Years | ✓ |
| Connecticut | 3 Years | ✓ |
| Deleware | NA* | |
| Florida | 3 Years | ✓ |
| Geoegia | 3 Years | ✓ |
| Hawaii | 3 Years | ✓ |
| Idaho | 3 Years | ✓ |
| Illinois | 3 Years | ✓ |
| Indiana | 3 Years | |
| Iowa | 3 Years | ✓ |
| Kansas | 3 Years | ✓ |
| Kentucky | 4 Years | ✓ |
| Louisiana | 3 Years | |
| Maine | 3 Years | ✓ |
| Maryland | 3 Years | ✓ |
| Massachusetts | 3 Years | |
| Michigan | 4 Years | ✓ |
| Minnesota | 3.5 Years |
|
| Mississippi | 3.5 Years |
|
| Missouri | 3 Years | ✓ |
| Montana | NA* | |
| Nebraska | 3 Years | ✓ |
| Nevada | 3 Years | ✓ |
| New Hampshire | NA* | |
| New Jersey | 4 Years | ✓ |
| New Mexico | 3 Years | ✓ |
| New York | 3 Years | |
| North Carolina | 3 Years | ✓ |
| North Dakota | 3 Years | ✓ |
| Ohio | 4 Years | ✓ |
| Oklahoma | 3 Years | ✓ |
| Oregon | NA* | |
| Pennsylvania | 3 Years | ✓ |
| Rhode Island | 4 Years |
✓ |
| South Carolina | 3 Years | ✓ |
| South Dakota | 3 Years | ✓ |
| Tennessee | 3 Years | ✓ |
| Texas | 4 Years | ✓ |
| Utah | 3 Years | ✓ |
| Vermont | 3 Years | ✓ |
| Virginia | 3 Years | |
| Washington | 4 Years | ✓ |
| West Virginia | 3 Years | |
| Wisconsin | 4 Years | ✓ |
| Wyoming | 3 Years | ✓ |
NA* No sales tax collected, no exemption needed.
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