After you file

I am trying to complete my brother's tax return.  He passed away last October.  I have received an EIN number for him but don't know if that is to be used on the tax form.  Also, there is rental property involved so I have schedules I have not had before.  What sheets of paper go with the return?  Am sending the Letters of Testamentary but just don't know how much of the things I have printed out are supposed to go to the IRS.