According to the documentation found at http://helpcenter.veeam.com/backup/80/vsphere/backup_to_tape_backups.html
when I create a backup to tape job from a backup job, I should be presented with the below screen.
But it just bypasses this screen. We are on version 126.96.36.1997. We do see this screen when we choose "Backup Repositories" instead of "Backup jobs". We are simply trying to get the last fulls to tape, not all of the fulls.