If you wish to edit your post in the forum.
Click on the gear icon in the top right corner then click on the edit option. You will be able to edit your post.
If you wish to delete your post in the forum
Unfortunately you do not have the option to delete your forum posts. This is a deliberate system setting and meant to help us regulate the forum. If you post something in error and you are uncomfortable with your comments (don't worry about typing errors etc) please send an email with a link to firstname.lastname@example.org to have your post removed.