How do i login into my valid email because it's saying wrong username?

am trying to change my password but it's not logging in and it's saying wrong username so i can't have access to my mails so how do icheck my mail Help

How do i login into my valid email because it's saying wrong username?
use forgot password link at mail.yahoo.com








try to login from here for faster and error-free access


http://us.m.yahoo.com/p/mail





and





It seems you are using new yahoo mail, which needs latest browsers.For error free emailing use yahoo mail classic





Use the below link to return to yahoo mail classic and click yes ,when it asks for "opt out"


http://us.mg1.mail.yahoo.com/dc/optout?s





for co.in account,


http://in.mg1.mail.yahoo.com/dc/optout?s

find work