What is the address for sending form 3911 to IRS?

Form 3911, "Taxpayer Statement Regarding Refund," should be sent to the address specified in the IRS instructions for the form. Generally, this address can vary based on whether you are filing your return from within the United States or from outside the U.S. For most taxpayers, the form is usually sent to the address for the IRS office that processes your tax return. It's best to check the latest IRS guidelines or the form's instructions for the most accurate mailing address.