I'm replying here because I can't find a way to ask a question. My daughter lives in a foreign country, and I do her tax return for her. She received AdvEITC checks in 2021, but since she wasn't eligible (foreign residency), I returned the checks to the IRS. However, she still got a 6419 letter indicating she was paid. I'm not sure what to do, but I'm leaning towards filing her return and showing zero received, and then await the inevitable letter claiming additional taxes due from the IRS and dealing with it then.