Can we change or edit the post permalink URL after publishing it in blogger? Yes. Blogger is providing this feature to customize the post URL. [How to customize post permalinks in blogger]. Earlier we could not even make our own permalink for our blog post. Now this new feature is much handy. But this option is also one time shot. If you accidentally or purposely hit Publish button, then we could not edit it after wards.
Today I realized that, even after customizing and publishing the post we can edit afterwards. There is button ‘Revert to draft‘. When you hit that button after publishing your post, that post would be now unpublished and remain as draft. Now you can customize post permalink URL as you require and hit ‘Publish‘ button. This would do the trick.