Three LORs are fine. You can send programs an additional letter, but its not mandatory. Get another one if you think it will significantly help your overall application.
so if most of the programs that I am applying to only requires three with the exception of a few that requires four, do I send the additional lor to eras or directly to the programs?
so if most of the programs that I am applying to only requires three with the exception of a few that requires four, do I send the additional lor to eras or directly to the programs?
Do the work - go to the website for each program you plan on applying to and see how many letters they require. 3 is fine for most but I've run across a couple programs that require 4.