Hi @katarina.haaralofste to follow up on @Julien_RENAUD reply, you don’t need to have the free version to sort out your new tasks in the Today, Upcoming and Later sections; but as Julien explained, the Today, Upcoming and Later sections in your My Tasks (How to Get Started With Asana My Tasks | Product Guide • Asana Product Guide) will disappear if there are no tasks in them.
To bring them back, move any of the tasks in your My Tasks list to the missing section (How to Get Started With Asana My Tasks | Product Guide • Asana Product Guide). You can do this by clicking the icon to the right of the task title in the main pane, or using the following keyboard shortcuts:
Tab+Y - Today
Tab+U - Upcoming
Tab+L - Later
Let us know if you have any follow-up questions!