QPTL is based entirely on Revenu Québec's published guidelines for payroll deductions in it's publication TP-1015.F-V - Formulas to Calculate Source Deductions and Contributions. It is not Revenu Québec's policy to approve or certify independant software provider's implementations of their guidelines. We have tested QPTL extensively and are confident of it's compliance with Revenu Québec's requirements.
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