If you registered your domain name through Yahoo!, we will automatically renew your domain each year (or, in the case of multiyear Yahoo! Domains registrations, at the end of your term). If your billing information is up-to-date, there's no need to do a thing.
You can double-check this information by visiting https://billing.yahoo.com. To update your payment method, click the "Update Payment Method" link next to the plan you'd like to edit.
Important: If you're using a domain that you registered with another company, that company is responsible for renewing your domain, and you must pay any associated fees to that provider. Yahoo! cannot renew domains registered through another provider.