As indicated in my last post, it's entered on the Home screen of GL. Scroll down and it's under "My Callings". Odds are you'll spot the red alert first. The alert indicates that the lessons haven't been entered.
Have you searched the Help Center? Try doing a Google search and adding "site:churchofjesuschrist.org/help" to the search criteria.
So we can better help you, please edit your Profile to include your general location.