How do you fill out form 3911?

To fill out Form 3911, which is used to request a refund trace for a tax refund, start by providing your personal information, including your name, Social Security number, and address. Next, indicate the tax year for the refund you are inquiring about and the reason for your request. Finally, sign and date the form before submitting it to the IRS. Make sure to follow any additional instructions specific to your situation to ensure proper processing.