Hey mblythecooper,
Thanks for reaching out. If you have a T4AP slip for your Canada Pension Plan (CPP) benefits, it should be included in the "Income" section of your tax return. Specifically, it would be reported under "Pension, annuity, or other income." On your tax return, it typically gets entered as part of your "Other Income" on line 11500 of your T1 form.
If you're unable to find it, make sure you're looking under the right section. The T4AP details should show the amount of CPP benefits you received, and this amount is what you need to report. If it still seems missing, you may want to contact Canada Revenue Agency (CRA) for clarification or review the slip for any discrepancies.
Thanks!