I WANT A HELP IN MAINTAING MY ADSENSE DETAIL

I WANT A HELP IN MAINTAING MY ADSENSE DETAIL . I DONOT GET ANY OF MY KEY AND I AM TOTALLY CONFUSED WHAT TO DO ..I WANT SOME TO SET MY YOUTUBE CHANNEL TO MY ADSENSE AND ITS VERY DIFFICULT TO SHARE THIS INFO...SO I ALSO SOMEONE WITH GOOD REPUTATION