Yes... with certain conditions and reservations.
If your e-mail address has changed, and you want the text of your story updated to reflect it, that's fine. Just let me know.
If you have a major revision of a story in mind, (for example, a new ending inspired by a song you just heard or some such), I'll be happy to accept a revision - once. As mentioned in FAQ #4, Odo's PADD is for completed stories only; more than a single revision is approaching a "work in progress" rather than a completed story.
If you feel a story is still evolving, please hang onto any revisions until you have it completed, then submit it.