Sometimes after I add a task, I think of additional information on it. Also, sometimes I hit Enter on accident when adding a task. I can see the new task in a small notification at the top of the screen, so I can click on that task and edit it. However, I know of no way to do this with a keyboard. I would like a new keyboard shortcut to activate/open the newly added task.

This keyboard shortcut could take one of two meanings:
1) Jumping/Go to most recently added task.
2) Jumping/Go to task in notification bar

Both of these would solve my primary use case/pain point. However, I suggest making the keyboard shortcut the second meaning. This makes it usable for more circumstances and more future-proof. For example, after undoing a tagging action, a message is shown describing the task that was edited. The same keyboard shortcut would jump to that task.