As an Admin, if you want to add announcements to edTPA, you can do so by clicking 'edTPA' on your navigation toolbar.
Once there, click on the 'Announcements' tab. Locate the edTPA program you want to create a new announcement for, or choose to create a 'General Announcement' and select 'New Announcement.'
Then, give your announcement a title, choose which program you are creating the announcement for, then give your announcement context. Once you're done, click '+Add New Announcement.'