Question: what is the deduction for cpp or qpp contributions on self-employment and other earnings?
Answer: Line 222 - Deduction for CPP or QPP contributions on self-employment and other earnings. You can claim, on this line, half of the total of your Canada Pension Plan (CPP) or Quebec Pension Plan (QPP) contributions, if any, from Schedule 8. You also can claim, on line 310 on Schedule 1, an amount for the other half.