How to edit T1 Part 4 Net income Other expenses description line 9270? It's pulling the description from the last return but it's incorrect.

From the navigation menu across the top of your screen when you're signed into your return, select Income > Self-Employment and then select Continue to step through the steps until your reach the spot.

It doesn’t give an option to change the description of other expenses.

You've already filed? What exactly is it that you're trying to do?