<prompt> Human: Hello, I paid 2000 on April 2017 on mygreatlakes and it was all paying off principal, no interest had accumulated yet. Am I allowed to claim a 2000 deductible on my taxes or is the deductible only applicable to payment on interest, no principal at all? Is there a deductible specifically for student loan principal that I can take advantage of?  <response>: You can only deduct interest payments, there is no write off for principle payments. 