Please see this answer from DianeW.
- Loan or mortgage ends. If your loan or mortgage ends, you may be able to deduct any remaining points (OID) in the tax year in which the loan or mortgage ends. A loan or mortgage may end due to a refinancing, prepayment, foreclosure, or similar event. However, if the refinancing is with the same lender, the remaining points (OID) generally are not deductible in the year in which the refinancing occurs, but may be deductible over the term of the new mortgage or loan. Simply divide the total or adjusted amount by the number of months of the life of the loan. This needs to be tracked until the loan is paid off.
