To remove your Yahoo account, take the following actions:
• Log in to the Yahoo Account Termination Page: To delete an account, sign in to the Yahoo Account Termination page with the Yahoo ID linked to it.
• Go over the terms and conditions: Make sure you understand the consequences of terminating your account, which includes losing your Flickr account and photos, Yahoo Messenger, My Yahoo settings, and other related data, by carefully reading the information provided. To continue, click "Continue".
• Input Password and Verify: To verify your identification, enter your Yahoo password. Click "Yes, terminate this account" to carry out the deletion after entering your password.
• Confirmation: Select "Got it" to confirm that the account termination procedure has been completed. Yahoo warns that it could take a few days, or even weeks, to finish the deletion process. Remember that any emails sent to this Yahoo address will receive a delivery failure message upon account termination.
• Yahoo notifies users that some data "may remain" in its records even after the account is completely closed. This is known as the "Data Storage Notice." Visit Yahoo's Data Storage and Anonymization support page to find out more about the information that may be kept.
Downloading any information you might need later is advised before deleting your Yahoo account because doing so will cause you to lose any related data and services. Furthermore, keep in mind that the deletion process might take some time to complete and that some data might still be retained in Yahoo's records after termination.
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Request for Unlimited Yahoo Account Creation – Simplify Account Management

I kindly request that Yahoo allow unlimited account creation. Accessing unused accounts isn’t as important, but having the option to delete accounts would be far more helpful and would save a lot of hassle. It’s frustrating to be delayed in creating accounts. Please implement this change immediately...