No, you do not enter your earnings from your T4A on the T2125 form. Only enter the amount of your income from self-employment on the T2125 form.
For more information about your T2125 please see:
T2125 Tax Form: Declare income and expenses from a business or profession
Guidelines for Reporting Self-Employment Income
For more guidance on your T4A please see:
T4 Tax Form: Salaried Income in Canada
Your Complete Guide to the T4A Tax Slip
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