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Information slips - T4 and other slips Details about the information reported on your T4 and T4A slips, what to do if you do not have your T4 slip, and how to get a prior year T4 slip.	Increase or reduce the tax your employer deducts from your pay
Employee or self-employed? Use Guide RC4110 to determine a worker's employment status.	Your responsibilities as an employee You are responsible for giving your SIN and TD1 form
What is deducted from your pay? CPP, EI, Income tax and other deductions	Where your tax dollar goes (Department of Finance web site)
Canada Pension Plan (CPP) contributions for CPP working beneficiaries Information about CPP contributions for employees who receive a CPP or QPP retirement pension.