Here's a quick answer to how to change the yahoo password. Open the Change Password link on Yahoo, log in if requested, and then follow the Go to Account Info by selecting your name at the top of the page. Yahoo Mail's Account Info link Go to Account security on the Personal details page. Change your password by clicking the Change password link under the How you sign in section. On the Yahoo Mail Account Security page, click the Change Password link. Type a new password as per the prerequisites given Select Show password to double-check that you're using the correct password.