I'm trying to setup my keychain option but it is sending a code to a phone number I don't have any longer. How can I change the information of the old phone number? I tried editing my iCloud information but it is already updated with my new number.

Hi Ernest IP6,

The information outlined below details what to do in order to change the phone number used to receive your verification code, and steps to take should you not have access to a device with iCloud Keychain enabled.

On your iPhone, iPad, or iPod touch, tap Settings > iCloud > Keychain > Advanced. (In iOS 7, tap Settings > iCloud > Account > Keychain.) Make sure the phone number under Verification Number is correct. If not, enter another phone number.

On your Mac, choose Apple menu > System Preferences. Click iCloud, then click Options next to Keychain. (In OS X Mavericks or earlier, click iCloud, then click Account Details.) Make sure the phone number under Verification number is correct. If not, enter another phone number.

If you can't access a device that has iCloud Keychain enabled, contact Apple Support and verify your identity to get help setting up iCloud Keychain.

Get help using iCloud Keychain - Apple Support

Regards