This amount is the same amount that you enter on your tax return at
line 222 - Deduction for CPP or QPP contributions on self-employment and other earnings.
To make Canada Pension Plan (CPP) or Quebec Pension Plan (QPP) contributions on self-employment and other earnings, see line 222.
On line 310 of Schedule 1, Federal Tax, enter, in dollars and cents, the same amount you claimed on line 222 of your return.
Remember to claim the corresponding provincial or territorial non-refundable tax credit to which you are entitled on your provincial or territorial Form 428.