The Lifetime Learning Credit (LLC) is non-refundable. That is, you can only use it to reduce an actual tax liability. If you are eligible, you have answered something wrong, in the interview. But, a lot of people are just not eligible. See:
https://www.irs.gov/individuals/llc
Dependents are not eligible. But, if you are a dependent, the person claiming you can claim the LLC on their return, even if you paid the tuition.
