Client is an executor for her father who died in May 2021. She must to do final and Estate income tax return.

She has 1099-DIVs with amounts in the box 1a, 1b, 3, 5, 7, 11, 12 with her father's SSN. Part of these amounts is before death, part after.

Does she have to file a 1099-DIV for the Estate? How? From several companies she has the info how much should be for final return and how much for Estate, but only for box 1a. What about other boxes?