Wrong address can mean lost tax refund.
That's the amount of unclaimed refunds that sat in the IRS account because the checks were undeliverable. Don't become one of those owed taxpayers. The IRS says there are many reasons why refund checks might not reach taxpayers. This is often the case with college students, who file their returns in the spring using a campus address and then leave for the summer expecting the refund check to follow them. Other undelivered refunds can occur because taxpayers provide an incorrect address when they mail their return.