FATCA: General

Why do I need to provide documents that I already gave to IBKR?
I responded to your email and provided the requested documents. Now I received an email saying my response was insufficient to resolve the issue. Why?
Are Non-US residents subject to withholding for tax purposes?
The information in your records is incorrect. I have no connection to the U.S. What can I do to remedy this situation?
I submitted IRS Form W-8. Why do I have to submit additional documentation?
I am an existing client. Why did I receive a request for additional documentation to support my tax status?
Tax reporting: Foreign tax paid as a foreign tax credit or as a deduction
I am not a U.S. taxpayer. Why do I have to submit IRS Form W-8?
Non-US persons and entities: If a new tax treaty is approved, when will we apply revised treaty rates to my securities transactions
Are there any special tax considerations if I hold a significant ownership interest in a Korean listed company?
I do not wish to submit any additional documentation or complete a new IRS Form W-8. What will happen if I do not respond?