You have already received some excellent advice. I would recommend reading over a three-week period.
CutCuts and puncture wounds the dose down in half the first week. The second week pick the low dose every other day. The third week take the same dose every third day and then stop. I'm assuming you will do this in consultation with your doctor.
Have you discussed this (your concerns and desire to discontinue your daughter's medication) with her doctor? You could potentially do more harm than good if her depression hasn't resolved. Has she had counseling to talk through the trauma?
The taper you mention does seem extremely conservative. Maybe a more structured taper would be appropriate?
I can understand your concerns but please don't let your fears affect your daughter. She may have doubts about herself and her ability to discontinue the med (or to function without it) so support her and encourage her and be patient with her. Perhaps everything you've already been doing. Just be careful.
J