Abstract: A computerized system for tracking multiple types of sales tax assessments for different taxing authorities on different types of sales transactions with customers has a programmed operation which includes: (a) a support file maintenance interface for maintaining support files for different tax types, taxing authorities, tax rates, customers, and sales types; (b) a sales entry interface for entering sales orders into the system by customer identification number, sales type code, and sales amount; (c) a sales recording module for creating a sales record corresponding to each sales order entered including the customer data obtained from the customer support file indexed to the customer identification number and a sales tax amount as computed by application of the tax rate designated in the customer support file to the sales amount for sales that are not tax-exempt; and (d) a sales tax reporting module for sorting the sales records by tax authorities, tax types, and sales types, and for creating a sales tax repo