Tax help for military filers

It took me a year to forget the personal going away.  Wish I could still forget - last year was a nightmare.  But I had 2 responses, one saying it's better for him to claim himself and one saying his would be the same regardless.  I'm assuming it would be the same regardless?  Also, can I do his taxes under my turbotax account or do I have to have a different account for military since it's free for him?