Misc. "Interest" from Korean Pension Service and Korean National Health Insurance
US Expat in Korea. Without getting complicated, my previous employer messed up my Korean Pension payments (comparable to US Social Security) and my National Health Insurance payments.
All premiums were refunded to me and then the workplace paid the proper new amounts back out to cover the retroactive payments. However, both the National Pension Service (NPS) and Health Insurance (NHIS) gave "interest" back to me for the premiums that they had held during the time that were incorrect (and then the employer had to correct their mistake).
Do I need to report this as "income" like interest income? Or could I just do it as miscellaneous income? Or would I have to report this at all? I didn't ask for this interest, it just came because of the employer's mistake.
Thank you.