W-8BEN vs W-9 at a Korean bank: which one do I file?
W-8BEN vs W-9 at a Korean bank — which form do I file? If you are a US citizen or green-card holder, you file W-9; if you are a non-US Korean national with the account, you file W-8BEN. The form proves your US tax status under FATCA and lets Korean brokers apply the right US…