There are many great sites on the World Wide Web but trying to actually find those great sites can be a frustrating experience. We have compiled a list of Websites that we have found to be helpful resources of information. When you click on a link, a new window will pop up. Close the window when you are ready to return to this page. The Internal Revenue Service Home of the IRS on the Web. Kansas Department of Revenue Home of the Kansas Department of Revenue. Oklahoma Tax Comission Home of the Oklahoma Tax Commission. Nebraska Department of Revenue Home of the Nebraska Department of Revenue. Missouri Department of Revenue Home of the Missouri Department of Revenue. Colorado Department of Revenue Home of the Colorado Department of Revenue. Texas Comptroller's Office Home of the Texas Comptroller's Tax website. California Franchise Tax Board Home of the California Franchise Tax Board. Sedgwick County, Kansas Sedgwick County, Kansas website.