EDIT Button

Might be a dumb question but I have to ask it. What happened to the edit button on posts? I went to go correct something I posted due to a typo and found out that I can no longer edit any of my posts.

Any help with this would be greatly appreciated!

If you wait say 24+ hours you loose the ability to edit a particular post.
I am not exactly sure of the time frame.

Ah thank you. I was a little confused there. I always thought I could edit no matter how long it has been. But thanks for the clarification