Can the author of a post be changed?
Once a post is created, the author of the post can not be changed.
The author of the post is determined by the Typepad account used to create the post. A blog Owner, Guest Author, Junior Author, or Co-owner (Business Class only) can create a post from within their individual Typepad account.
When posts are imported to Typepad, the blog owner will be assigned as the author of all imported posts. Even if the imported posts were created by multiple authors originally, the imported posts are created within the blog owner's account during import, and the blog's owner will be assigned as the author of all imported posts.
If you need to change the author of a post, the original post will need to be recreated in the Typepad account for the preferred author. You can use the Publish On option for the post to backdate the post and match the original date and time of publication.