Provide us with set up information. This could be a backup of your present payroll if it computerised. We need personnel information on employees (name address salary etc) and tax information together with cumulative details for existing employees
Various rules about payment terms such as overtime or shift rates, holiday entitlement etc.
From payroll to payroll you tell us about changes - permanent ones like rates, or temporary ones like hours worked, going on holidays, miscellaneous pay etc.