You can change a password for a Yahoo account in one of two ways. In the first instance, you know your current password, log in to your account, and change the password. In the second instance, you have forgotten your current password and need to gain access to your account via an alternate method such as another email, a mobile phone or by answering security questions. If you have forgotten your password, Yahoo does not give you options to retrieve it. Instead, Yahoo verifies your identity and allows you to set a new password.
When You Know Your Current Password
Log in to your Yahoo email account and click "Account Info" under the "Help" icon, resembling a cog.
Select "Change your password" in the Sign-In and Security section.
Type your new password twice, taking care both entries match. Yahoo alerts you if they don't. If you are in a secure location, check the "show password" box to display characters instead of dots. Click "Continue" to set your new password and to be routed back to your Account Information page.
When You Don't Know Your Current Password
Go to Yahoo's password helper page (See Resources). Choose "I have a problem with my password" and click "Next."
Enter your Yahoo ID and click "Next."
Choose an option for resetting your password. Depending on your Yahoo account information, several options display, including providing a mobile phone number, an alternate email address or answering a secret question. Yahoo displays only choices to reset your password specific to your account, so you may see different options than those pictured here. Click "Next."
Follow Yahoo's instructions for resetting your password. Depending on your choice, this may include clicking a link you received in an email, entering a verification code you received on your mobile phone, or answering the secret questions directly on screen. This example displays the email option.
Enter a new password twice. Click "Continue" to submit your password, be logged into your account, and be routed to the Yahoo home page.