When the Internal Revenue Service (IRS) extended the federal income tax filing deadline to May 17 for 2021, it left another important deadline untouched: U.S. taxpayers who owned foreign bank accounts in 2020 remained obligated to disclose these accounts by April 15. Since this date has passed, what should you do if you failed to file your Report of Foreign Bank and Financial Accounts (FBAR) on time? Boston international tax attorney Kevin E. Thorn, Managing Partner of Thorn Law Group, explains: