Who is required to fill out a Kansas K4 Form?
Employees with Kansas source wages hired after January 1, 2008 are required to submit Kansas Form K-4 to their employer. The Kansas Form K-4 is optional for most employees hired prior to January 1, 2008. The Kansas Department of Revenue will notify existing employees (those hired prior to January 1, 2008) who are required to update their withholding.
