CCH, Inc. has announced the debut of its online tax preparation and filing service, CompleteTax. The service allows both Mac and PC users to file both a federal and state tax return for US$17.95 combined. CompleteTax, which is an IRS e-file partner and can file returns electronically with both the IRS and all 42 states that allow electronic filing, gives users the choice of filing electronically or printing out their return and mailing it themselves.