Answer: $17000
Step-by-step explanation:
TaeHwan's bad debt expense for 2018 would be calculated as the difference between the desired year end balance and the beginning balance written off. This will be:
= $21000 - ($18000 - $14000)
= $21000 - $4000
= $17000
Therefore, TaeHwan's bad debt expense for 2018 would be $17000.