the wrong contact is identified as me

When i bought my iPhone, the guy helping me designated 'me' as my daughter. I was able to correct it later on the iPhone but my Macbook still thinks I am my daughter. I want to send myself an email to remind myself of an event in the iCloud calendar and my daughter's email comes up. I went to contacts on my mac and her contact info is designated 'me'. How can I change that designation in my Mac/icloud? Thanks!