What is the "Payer's address" for the IRS? I received a 1099-INT (interest income from the IRS) which doesn't include this info.

On the "Federal Review" section, "Your to-do list", I have an entry for "Answers to review.  When I click Review, it says to "Check this Entry" for "Schedule B -- Form 1099-INT (Department of the Treasury Internal Revenue Service): Payer Street Address must be entered".  The letter I received from the IRS shows the calendar year, recipient's identification number, total interest paid or credited, and payer's federal identification number (38-1798424). But there's no payer address.  So what should I enter to be able to continue?  The purpose of it: "Statement showing interest income from the Internal Revenue Service)."