The Taxpayer Advocate Service

(TAS) is an independent organization within the IRS that helps taxpayers and protects taxpayer rights. TAS’s job is to ensure that every taxpayer is treated fairly and knows and understands their rights under the Taxpayer Bill of Rights .

of a foreign corporation. Also, use Form 1120-F to claim any refund that is due to transmit Form 8833, Treaty-Based Return Position Disclosure Under Section 6114 or 7701(b); or to calculate and pay a foreign corporation’s branch profits tax liability and tax on excess interest, if any, under section 884.