Edit or Delete Post or Thread?

Is there any way to edit or delete a post or thread you have made?

There is, but I believe you have to do it within a certain time frame. Once that time has elapsed there is no way to change it.

You can edit your post for an hour after you create it.
After that, you can request a moderator to make changes.
Typically, moderators will correct dates & phone numbers, or delete data for security reasons.