A part owner of several restaurants in Connecticut and Massachusetts was sentenced to 18 months in prison for operating an extensive tax fraud scheme.

According to court records, William Chen, 49, of West Hartford, Connecticut, activated “zapper” software on the point-of-sale system for the restaurants. The software deletes transactions from the system to create fraudulent sales records.

As a result, Chen intentionally suppressed the restaurants’ taxable income that he disclosed to his accountant who prepared his and his restaurants’ income tax returns.

The tax loss attributable to Chen’s criminal conduct is more than $2 million.