Looking for a DETAILED process for reporting Nominee Distributions

I'm in the process of filing my mother's final return and am having trouble finding detailed information regarding the process of reporting nominee distributions for her forms 1099-INT and 1099-DIV.  I find the IRS instructions pretty straightforward. My questions are more related to document formatting and IRS expectations - things that seem to be generally understood by experts/professionals but not documented. So, here are my questions:

When filing the 1099-DIV and related 1096, should I indicate that the filer is deceased somewhere on the form (example: Jane Doe (deceased))?

My mother received form 1099-DIV from her brokerage with entries for 5 different mutual funds with varying types of income. I have allocated amounts for each "box" between my mother's return and the recipient's return (her trust). Do I need to file a corresponding 1099-DIV for each mutual fund, or do I consolidate all amounts into a single 1099-DIV? If I must file a 1099-DIV for each mutual fund, is some notation necessary to indicate the relationship between the nominee 1099-DIV and the original 1099-DIV? In either event, is any additional notation necessary to clarify the calculation of the nominee amounts?