Open Yahoo Mail and tap on the Yahoo Mail app icon. Now, tap on the three-dot menu that is available in the top-left corner of the screen or the search bar. To change Yahoo password, Tap on Manage Accounts. Search your account name in the signed-in account list that appears on your screen. Now, tap on Account info that is a link just below the name of the account. Then tap on Security Settings. Now enter the password. After that, tap on Change Password. Now tap on ‘I would rather change my password’. Create a new password in the ‘New Password’ text field and then re-type on the password field. Tap on Continue to change your Yahoo mail password.