Abstract
The automatic data processing system for internal businesses at the National Tax Administration Agency was first implemented in 1966 and upgraded and expanded several times since then. At present HITAC-M series computer systems are set up at three processing centers in Tokyo, Osaka and Nagoya, under which 164 taxation offices out of total 506offices are organized. The data are centrally processed in batch mode. Each system comprises three subsystems for income tax, corporation tax and credit control, and can compute the amount of taxes, register taxpayers, print out forms and do other related office works. Over 50% of individual and corporate taxpayers are now covered by this system.
