Deductions & credits

There are figures.  He sent a picture of the form via text and is mailing out to us.  He's stating that there is around $6000 we have to claim.  He said his accountant has done a 180 on him.  Not sure what that means.  All I know is we were told originally nothing had to be claimed.  And that the executor (brother-in-law) was withholding an amount out to pay any taxes that were owed.