| State | Form |
| Federal | Form W-4 |
| Alabama | AL A-4 |
| Alaska | None |
| Arkansas | AR AR4EC |
| Arizona | AZ A-4 |
| California | CA DE 4 |
| Colorado | CO uses Federal W-4 or DR 0004 |
| Connecticut | CT CT-W4 |
| Delaware | DE uses Federal W-4 |
| District of Columbia | DC D-4 |
| Florida | None |
| Georgia | GA G-4 |
| Hawaii | HI H4 |
| Idaho | ID W-4 |
| Illinois | IL IL-W-4 |
| Indiana | IN WH-4 |
| Iowa | IA W4 |
| Kansas | KS K-4 |
| Kentucky | KY K-4 |
| Louisiana | LA L-4 |
| Maine | ME W-4ME |
| Maryland | MD MW507 |
| Massachusetts | MA M-4 |
| Michigan | MI MI-W4 |
| Minnesota | MN W0-MN |
| Mississippi | MS W4 |
| Missouri | MO W4 |
| Montana | MT M4W |
| Nebraska | NE W-4N |
| Nevada | None |
| New Hampshire | None |
| New Jersey | NJ NJ-W4 |
| New Mexico | NM uses Federal W-4 |
| New York | NY IT-2104 |
| North Carolina | NC NC-4 |
| North Dakota | ND uses Federal W-4 |
| Ohio | OH IT 4 |
| Oklahoma | OK OK-W-4 |
| Oregon | OR uses Federal W-4 |
| Pennsylvania | PA uses Federal W-4 |
| Rhode Island | RI RI W-4 |
| South Carolina | SC uses Federal W-4 |
| South Dakota | None |
| Tennessee | None |
| Texas | None |
| Utah | UT uses Federal W-4 |
| Vermont | VT W-4VT |
| Virginia | VA WA-4 |
| Washington | None |
| West Virginia | WV IT-104 |
| Wisconsin | WI WT-4 |
| Wyoming | None |