How many calorie should i eat if i want to lose weight and I'm a 14yr old girl who is 5ft 5?

Ok well i just checked her B.M.I which stands for Body Max Idex her B.M.I is 21.0 placing her at the 75th percintile. She is at a healthy weight. For her to be at a risk of becoming overweight she would be at the 85th percintile. For you to take a look for yourself go to google and type in child and teen B.M.I and click the first website on the page.