First determine did he meet the maximum taxable income
82700 + 52700 = 135400
He was over the max
He shuld onlly pay on the max amount
114400 * .063 = 7207.20
He paid on 135400
135400 * .063 =8530.20
Taki the amount he paid and subtract the max he should pay to determine the amount he overpaid
8530.20-7207.2 =1323.00
He overpaid 1323.00
He should be refunded 1323.00