Please make sure you are on the right page. To enter a T4A slip in TurboTax Online:

1. Click on Find (magnifying glass) in the top right-hand corner. Type "T4A" in the box, then select "T4A Pension, Retirement, Annuity" from the list, and click “Go”.
2. Click the “Enter New T4A for [You Name]” button.