Testing accuracy of source deductionsPayroll needs to develop test plan that covers all relevant data valuesBy Alan McEwen09/09/2013|Canadian Payroll Reporter|Last Updated: 09/09/2013 One of payroll’s essential duties is to ensure employees are paid accurately.Among other things, this means assuring payroll source deductions — income tax, Canada Pension Plan (CPP) and employment insurance (EI) — are being calculated properly. The essential tools for this task are the Canada Revenue Agency’s (CRA) Payroll Deductions Online Calculator and Revenu Quebec’s WinRAS. The government publications that provide the technical details behind these tools are also important: the CRA’s T4127 and Revenu Quebec’s TP-1015.F guides.For payroll, having these in your toolkit leaves you free to the focus on the input values required for your test plans. The goal should be to systematically develop a test plan that covers all of the data values relevant to your own particular situation. To Read the Full Story, Subscribe or Sign In Remember Me Forgot Password If you are a current Subscriber, please click here to set-up or update your login information.