Hi bonniefromrumson,
Thanks for using the Apple Support Communities.
While you cannot edit information for suggested contacts, you can edit the information associated with your contacts. To learn how to do this, check out the link below.
Create or edit contacts in Contacts on iCloud.com - Apple Support
Please know that you can create a new contact or edit an existing contact on iCloud.com. You can also add or delete fields in a contact for default information, such as a phone number or email address, and you can add fields for additional information, such as a birthday, nickname, or spouse’s name.
To perform the above troubleshooting actions recommended by the article, please read through and complete steps 1 through 4.
We’re recommending the steps above because they directly address the issue you initially reached out to the community about, which is wanting to know how to edit contacts.
If the original problem persists after trying the previous steps, please provide us with specifics on what you see for more help, and we will continue from there.
We also noticed that you visited an article before posting, Use Messages on your Mac. Let us know if you have any additional questions we can assist with about that particular article. Please do not include any personal information in your reply if you do.
Cheers!