103 KAR 18:110
103 KAR 18:110. Voluntary withholding
Section 1. Additional withholding. In addition to tax required to be withheld by the tables required by KRS 141.370 or by any withholding computer formula published by the department, an employee may authorize his employer to withhold additional Kentucky income tax using Form K-4, Kentucky Withholding Certificate, Revenue Form 42A804.