How do I change user id?

I seem to have two Yahoo user Id's, but only one gets me into the yahoo-group for which I am a member.How do I change user id?
For security reasons yahoo do not allow you to change your email address or yahoo! ID you need to open a new account to get a different address, but you can create a extra yahoo email address within your present account to do so use this link.

http://edit.yahoo.com/config/list_alias



Please note that Yahoo! limits the creation of Extra Email Addresses to two times within a one year period.



To create a new yahoo account Click the link below to a get new account application form.https://edit.yahoo.com/registration?.int…How do I change user id?
You cannot change your ID name or address.

You can cancel the old account and open a new one with the desired information. Or simply open a new account with a different name and password, and use both.