If I answer a question, get an upvote, downvote, or 'accepted' answer, then edit the answer, what happens to the votes? I don't get enough upvotes to experiment, lolz.
Existing votes are not affected by edits.
Answers can be accepted or unaccepted at any time after the initial timeout period.
Votes are usually immutable after a short grace period (5 minutes, IIRC) unless the post is edited. If you edit your post, folks have a chance to change their previous votes to reflect the new content. As a result, making minor edits may or may not work in your favor--you can gain votes by improving your post, or potentially lose votes that were previously "locked in."
Your mileage can (and will) vary.