Information relating to tax obligations is reported as required to the tax authorities within your country of residence as well as other countries if trading products subject to any local withholding requirements.  Unless specifically directed by a taxing authority, IBKR does not withhold taxes on proceeds from security sales. We are required by US tax law, for example, to withhold US taxes on dividends paid by US corporations to foreign persons at a rate of 30%. This rate may be lower if the US has entered into a tax treaty with your country. In addition, investment interest income is not subject to US withholding. All withholdings for non-US persons and most entities will be reported on Form 1042-S at the close of each year. For further information refer to IRS publication 901 and/or your tax advisor.