I have been dealing with the same problem (loans from UG and grad are lumped) and our servicer has been unable to provide us with the amount. I just found an answer from another thread, and it looks like you approximate the interest paid in grad based on the proportion of grad:undergrad monies in the total. See here: <a rel="nofollow" target="_blank" href="
https://ttlc.intuit.com/questions/4283042-for-the-massachusetts-student-loan-interest-deduction-how-...>
