Boy Scout of America how to find what merit badges i need?

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Hello, I am class star in Boy Scout Of America, and I/and my other members in my troop to pick 5-10 things we need/want to do. I was wondering if there was a site that would tell me what merit badges I have done, and ones that I some done, because I know i a lot that are not complete, but I do not remember. please help asap!