If you were legally obligated (did you co-sign?) to pay his student loans, you can deduct interest paid on a student loan. There is never a credit or deduction for paying off the principal on a loan.
STUDENT LOAN INTEREST
Only the person whose name is on the student loan and who is legally obligated to pay the loan can deduct the student loan interest. If you co-signed then you are legally obligated to pay if the primary borrower defaults or does not pay. If you did not sign or co-sign for the loan you cannot deduct the interest.
WHERE DO I ENTER STUDENT LOAN INTEREST
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-credits-deductions/enter-student-loa...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
