How do I get a refund? And how do I get turbo tax to pay what I owe the irs like its says in their satisfaction guaranteed?

How do I get a refund? And how do I get turbo tax to pay what I owe the irs like its says in their satisfaction guaranteed? Turbo tax said I was getting $400 back and the irs approved it, then they rejected it and said I owe $1300. Pretty big difference I would say.