CompleteTax is online tax preparation software for individuals to use to prepare and file their federal and state income tax ... returns. CompleteTax’s online tax preparation software is developed by CCH, a Wolters Kluwer business. CCH has been providing tax, accounting and audit information and software solutions since 1913, the year the U.S. federal income tax was created. CCH offices in the United States are located in Riverwoods and Chicago, IL; Washington, DC; New York, NY; Torrance, CA; and Wichita, KS. read more