QPTL is a library of Québec payroll tax calculations available for licensing to payroll application software developers. It can be used to calculate payroll tax deductions required by Revenu Québec on all types of employment income, including regular salary & wages, pension income, bonuses, retroactive pay increases and commission income. Revenu Québec payroll tax deductions include Québec Pension Plan (QPP), Québec Parental Insurance Plan (QPIP), and province of Québec income tax withholding.
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