I know my username and password but still can't sign in
Go to the Yandex.Passport main page and enter your username and password. Make sure you don't have Caps Lock on and you are using the English keyboard layout.
Note. Type your username and password using the keyboard and do not copy them from the clipboard, because you could accidentally copy an extra space and not be able to log in.
If you still can't log in, try resetting your password.