So I just realized that only 1 of the schools I applied to requires an additional LOR more than all the other DO schools I'm applying to. However, this school, NYIT only accepts submission of LORs from AACOMAS. I do not want to send this extra unnecessary letter to all my other schools, so is it possible to add this LOR later on and send it only to a selected school or by submitting it to AACOMAS will it then send to all the other schools as well, even after submission of the completed application.