how do i delete an icloud account on iphone 6

Hey Liz,

You should be able to sign out of an iCloud account by going to Settings > iCloud and scroll to the bottom and you will see an option to sign out the account. If you have multiple accounts, then you can go to Settings > Mail, Contacts, Calendars and choose the account and scroll down to the same sign out option.

iCloud: Change iCloud feature settings

http://support.apple.com/kb/PH2613

Regards,

-Norm G.