Last year I filed an extension in IL. I made a payment. When I finalized and filed my return to the state, turbo tax identified that the the amount I paid upon submitting my extension was an overpayment. Therefore, I received a refund of part of the payment. Do I record the payment and refund this year? Or do I subtract the overpayment amount and submit the difference as payment made in 2018 for 2017 state taxes?