I have received a notice and bill from the IRS in regards to my 2020 return which states "We changed your 2020 form 1040 based on the tentative carryback application or carryback claim you filed. As a result you owe ... ".
I have know idea what they are referring to or where in the return to look. I don't recall filing a "carryback claim".
Anyone know what they might be referring to and where to look?
Thanks,
Brian
