Answer:
December 31 Interest expense $3900 Dr
Interest Payable $3900 Cr
Explanation:
The interest and principal is both payable at maturity thus we need to accrue the interest payment and create a liability against the amount of interest due. The adjustment is made 6 months from the issue of the note thus the interest for 6 months is due. The entry would be to record 6 month's interest that relates to this year. The interest expense will be,
120000 * 0.065 * 6/12 = $3900
As the payment is not made until maturity we will credit interest payable by this amount.