Sorry to read about your son’s issues and hope it does improve.
When I got out of the Army the 1st time, I was discharged from hospital and was enrolled in VA at less than 10%. When I went back in 7 years later, I had to get that discharge code changed. While active I was able to take advantage of Education and VA mortgage benefits.
After retirement, I tried a number of times but can’t seem to get on board, not even acknowledge my previous status. Have been told unofficially I will qualify under various scenarios, agent orange, hearing etc. Actually filled out forms and for more than a year would get a letter every couple months saying they were working on it. Then I got a letter with all the blank forms to start again. Of course I didn’t have a copy of the previous submitted. Never could get any info online. Attended a couple of the local seminars and still no help. All very frustrating. My only purpose is to be in the system in event something does happen to me, Sophie can possibly get some sort of assistance. Someday I may try again.