Im the executor for my dad he has passed and has an account with 10,000.00 in in. what info do i need to bring to the bank

Letters and a death certificate.  If this is all there is, and you have not filed the will yet, skip the will and for $1 file a Voluntary Administration with the Surrogate's Court.  The clerk will help you.  Bring the account information for the order from the court.  They do it while you wait.