jrotc nom

My JROTC instructor offered to give me a nomination, but I can't seem to find a portal to send to him to fill out. He has done it in the past for USAFA and he said that he received an online portal that he had to fill out, but I haven't found any such port for USNA. Any help is great, thank you.

How early can a JROTC cadet put in a request to SMI for nom? DS currently a junior in AJROTC with apps started at USMA and USAFA. Can he request now?