... You can then add a user under the "Accounts and Identity" link.

Yes, you can. But what happened to the article that walks users through that process? The link the OP posted, that I've been referring posters to for years, now returns "404 Error", and if there is a replacement page, I cannot find it. [Edited: "Inflammatory"]

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... https://www.xfinity.com/support/articles/adding-new-user-names-or-email-addresses ...

Since that page appears to be dead, try https://forums.xfinity.com/conversations/my-account/answered-how-to-add-invite-manage-and-remove-users-on-your-xfinity-subscriber-account/602da482c5375f08cd7fd378, which is pretty much a copy of it.

The simplest way to add a user is by following the instructions for setting up a Viewer user account.

Note that you need to log in with the Primary UserID to create a new user/email address.

The UserID you create is also the first half of an @Comcast.net email address, but to use it you must first log in with the new ID and then visit https://connect.xfinity.com/ to activate it.

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

Thank you for reaching out to us @SammyS56! I see flatlander3 and BruceW provided some helpful tips! Additionally, you can create an ID here.