I recently spoke with an H&R Block person about this and she told me that those credits are non-refundable. Upon further explanation, she told me that, yes, paying your tuition with loans DOES qualify you, but you have to be paying money TO the government already to apply these credits to your owed amount. In other words, she told me that people like me -- meaning you're a med (or whatever) student, you have no job and therefore no income, and you wouldn't be filing otherwise -- can't claim the credit and get any money back from the government.
Definitely ask your people about this, by all means...and if you get differing information, post it here. I'd definitely love a free $2000.
BP