This would be on the bottom of the t4 slip page.
How to edit to the T4 Slip in TurboTax Online:
1. In the upper-right corner of your screen, select Find (magnifying glass 🔍) *.
2. In the Find window, type in “T4” and select “T4 Employment Income”. Click the “Go” button.
3. Click "Edit" next to the slip you want to change.
