Hi. My name is***** you for your question and the opportunity to assist.
Can you tell me which program you are setting up your Yahoo! mail in.
Is it Microsoft Outlook or the Windows 10 Mail app or something similar?
Are you able to access your Yahoo mail using a browser like Microsoft Edge, Google Chrome or Mozilla Firefox?
Can you tell me the email address you are having the problem with?
We can try to reset the password ***** get you back in.