| State | Audit |
| Alabama | The statute of limitations for an audit is 3 years from the later of the due date or the file date of the tax return. If income was understated by more than 25%, the statute of limitations is 6 years. |
| Alaska | AK does not have a personal income tax. |
| Arizona | The statute of limitations for an audit is 4 years from the later of the due date or the file date of the tax return. If income was understated by more than 25%, the statute of limitations is 6 years. |
| Arkansas | The statute of limitations for audits is 3 years from the later of the due date or the file date of the tax return. If income was understated by 25% or more, the statute of limitations is 6 years. |
| California | The statute of limitations for audits is 4 years from the due date (file date, if later). |
| Colorado | The statute of limitations for audits is 3 years from the due date. |
| Connecticut | The statute of limitations for audits is 3 years from the later of the due date or the file date of the tax return. |
| Delaware | N/A |
| DC (Washington) | The statute of limitations for audits is 3 years from the later of the due date or the file date of the tax return. If income was understated by more than 25% the statute of limitations is 6 years. |
| Florida | FL does not have a personal income tax. |
| Georgia | The statute of limitations for audits is 3 years from the later of the due date or the file date of the tax return. |
| Hawaii | The statute of limitations for audits is 3 years from the later of the due date or the file date of the tax return. |
| Idaho | The statute of limitations for audits is 3 years from the later of the due date or the file date of the tax return. |
| Illinois | The statute of limitations for audits is 3 to 3.5 years from the later of the due date or the file date of the tax return. |
| Indiana | The statute of limitations for audits is 3 years from the later of the due date or the file date of the tax return. |
| Iowa | The statute of limitations for audits is 3 years from the date the tax return was filed. |
| Kansas | The statute of limitations for audits is 3 years from the date the tax return was filed. |
| Kentucky | The statute of limitations for audits is 4 years from the later of the due date or the file date of the tax return. |
| Louisiana | The statute of limitations for audits is 3 years from Dec. 31 of the year taxes were due. |
| Maine | The statute of limitations for audits is 3 years from the later of the due date or the file date of the tax return. If income understated by more than 50%, statute of limitations is 6 years. |
| Maryland | The statute of limitations for audits is 4 years from the date taxes were due. |
| Massachusetts | The statute of limitations for an audit is 3 years from the later of the due date or the file date of the tax return. If income was understated by more than 25% the statute of limitations is 6 years. |
| Michigan | The statute of limitations for an audit is 4 years from the later of the due date or the file date of the tax return. |
| Minnesota | The statute of limitations for an audit is 3.5 years from the later of the due date or the file date of the tax return. If misstated by more than 25%, statute of limitations is 6.5 years. |
| Mississippi | The statute of limitations for an audit is 3 years from the date the tax return was filed. Once the audit begins, the statute of limitations is held open. |
| Missouri | The statute of limitations for audits is 3 years from the later of the due date or the file date of the tax return. |
| Montana | The statute of limitations for an audit is 3 years from the later of the file date or the last day of the month following the due date. |
| Nebraska | The statute of limitations for an audit is 3 years from the later of the file date or the last day of the month following the due date. |
| Nevada | No personal income tax |
| New Hampshire | The statute of limitations for an audit is 3 years from the later of the file date or the last day of the month following the due date. |
| New Jersey | The statute of limitations for an audit is 4 years from the date the income tax was filed. |
| New Mexico | The statute of limitations for an audit is 3 years from the end of the year the payment was due. If income was understated by more than 25% the statute of limitations is 6 years. |
| New York | The statute of limitations for an audit is 3 years from the later of the due date or the file date of the tax return. |
| North Carolina | The statute of limitations for an audit is 3 years from the later of the due date or the file date of the tax return. |
| North Dakota | The statute of limitations for an audit is 3 years from the later of the due date or the file date of the tax return. If income was understated by 25% or more, the statute of limitations is 6 years. |
| Ohio | The statute of limitations for an audit is 4 years from the later of the due date or the file date of the tax return. |
| Oklahoma | The statute of limitations for an audit is 3 years from the later of the due date or the file date of the tax return. |
| Oregon | N/A |
| Pennsylvania | The statute of limitations for an audit is 3 years from the later of the date filed or end of the year in which the tax liability arose. |
| Rhode Island | The statute of limitations for an audit is 3 years from the later of the date filed or the 15th day of the month in which the return was due. |
| South Carolina | The statute of limitations for an audit is 3 years from the later of the date filed or end of the year in which the tax liability arose. If income understated by 20% or more, statute of limitations is 6 years. |
| South Dakota | South Dakota does not have a personal income tax. |
| Tennessee | The statute of limitations for an audit is 3 years from the end of the year in which the tax return was filed. |
| Texas | Texas does not have a personal income tax. |
| Utah | The statute of limitations for an audit is 3 years from date the tax return was filed. |
| Vermont | The statute of limitations for an audit is 3 years from the later of the due date or the file date of the tax return. The statute of limitations is 6 years for misstatements of 20% or more. |
| Virginia | The statute of limitations for an audit is 3 years from date the tax return was due. |
| Washington | WA does not have a personal income tax. |
| West Virginia | The statute of limitations for an audit is 5 years from the later of the due date or the file date of the tax return. |
| Wisconsin | The statute of limitations for an audit is 4 years from the file date or 4 years after the due date of the tax return. |
| Wyoming | WY does not have a personal income tax. |