I have a client  - similar situation, husband passed in 2021. Filed early March - A few weeks later called me with what sounds like a similar letter. She tried at calling a # and maybe going on line, I was getting ready to help her out and said - "Lets check your bank account one more time for the refund" - and lo and behold it had just showed up. So we figured all is well and didn't proceed any further. I never saw the letter, which she had ready to send me as we dropped it at that point.