WinTax is a Canadian payroll tax calculator. WinTax is similar to WinTOD, which is a product issued by Canada Customs and Revenue Agency. Both programs provide users with an easy way to calculate taxes on regular salary, bonus, retroactive pay, and commission. Calculations include CPP, EI, Federal tax, and Provincial tax (including Quebec). WinTax has these additional features over the WinTOD: save employee information; easier to understand tax calculation reports; Quebec Provincial tax calculation; User definable earnings and deductions? WinTax 2004 Calculator can calculate and save payroll tax calculations for one employee for any province. Wintax Pro has more features and reports to do payroll processing for multiple employees.