Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Can I resubmit W8-BEN with W9 form?
Since you're a US citizen, submitting W8-BEN was wrong. If you read the form carefully, when you signed it you certified that you are not a US citizen, which is a lie and you knew it. W9 and W8 are mutually exclusive. You're either a US person for tax purposes or you're not, you cannot be both. As a US citizen - you are a US person for tax purposes, whether you have any other citizenship or not, and whether you live in (or have ever been to) the US or not. You do need to file tax returns just like any other US citizen. If you have an aggregate of $10K or more on your bank accounts outside of the US at any given day - you need to file FBAR. FATCA forms may also be applicable, depending on your balances. From foreign banks' perspective you're a US person, with regard to their FATCA obligations. Whether or not you'll be punished is hard to tell. Whether or not you could be punished is easy to tell: you could. You knowingly broke the law by certifying that you're not a US citizen when you were. That is in addition to un-filed tax returns, FBAR, etc etc. The fact that you were born outside of the US and have never lived there is technically irrelevant. Not knowing the law is not a reasonable cause for breaking it. Get a US-licensed tax adviser (EA/CPA licensed in the US) to help you sort it out.