Finally went for the CFAT last week (It's not so bad) but was taken a bit by surprise when I was asked to fill out a questionnaire indicating what drugs I have done, when and how often.   I'll filled it out to the best of my ability at the time, however I am concerned about one answer in particular.
For one of the indicated drugs I answered that I had only consumed it once.   When I came home and went over it with my wife (whom I have know since we were quite young) she paused and effectively said; "what about this time ...and that time ...and the other time."   I know It's a silly mistake to make, but bit of a pop quiz and I felt a bit rushed as I was the last one in the room to complete it.   Anyway, needless to say my hand met my forehead pretty quickly.
I have considered just writing a note and including it in my file, explaining the error and providing a correction.   However given that the consequences of misrepresenting yourself on this form can be so dramatic (ie. release) I would be interested in gaining some feedback.   
How might you handle this situation and what might you recommend. I invite replies from everyone of course but would be especially interested in hearing from those in the recruiting field.
Regards,
Joe