From IRS Pub 559:

How to report. If you are preparing the decedent's final return and you have received a Form 1099-INT for the decedent that includes amounts belonging to the decedent and to another recipient (the decedent's estate or another beneficiary), report the total interest shown on Form 1099-INT on Schedule B (Form 1040), Interest and Ordinary Dividends. Next, enter a subtotal of the interest shown on Forms 1099, and the interest reportable from other sources for which you didn't receive Forms 1099. Then, show any interest (including any interest you receive as a nominee) belonging to another recipient separately and subtract it from the subtotal. Identify the amount of this adjustment as “Nominee Distribution” or other appropriate designation.

Report dividend income for which you received a Form 1099-DIV on the appropriate schedule using the same procedure.