I have changed my apple ID, but iCloud will not update this new email address and now I can not log on to iCloud on my new iPad. What to do?

Hello Cathrine,

Thank you for the details of the issue you are experiencing after changing your Apple ID. I recommend the following articles for an issue like this:

iCloud: "Incorrect Apple ID or Password" alert when setting up iCloud after upgrading to iOS 7

http://support.apple.com/kb/TS5207

iOS 7: If you're asked for the password to your previous Apple ID when signing out of iCloud

http://support.apple.com/kb/TS5223

Thank you for using Apple Support Communities.

Best,

Sheila M.

You need to sign out completely in Settings>iCloud by clicking 'Delete account' (this will not delete the account from the server) then sign back in with the new ID.