Changing Permalink Structure of an Already Published Post

Suppose you published a post on your Blogger blog by defining custom permalink for it but later noticed that you have typed something incorrectly, or you didn't like the permalink and decided to change it. Now you may face difficulties because Blogger disables the permalink editing once the post is published. Most bloggers copy the content, delete the published post and create a new one, but you don't have to delete the post at all. To change the link structure of an already published post, simply edit the post, revert it to draft and then customize the permalink the way you like. After editing the URL, publish your post again.

If your published post was indexed in Google, then go to Google Webmaster Tools and remove the old post URL. After that, fetch the new post. Or you can set a redirect from your blog's settings. This will help you eliminating 404 errors and your blog will maintain a good user experience.