I use comment section and a yellow sticky note in the folder that says "son even years". I never remember to look at my permanent comment notes. I also print out the info worksheet for a year the kid is on and leave it in the file, so I have the info in front of me to put them back on. I've never left them on the return and changed the code. To afraid I might forget and then have a problem to amend.  overkill maybe but it works for me - especially when already stressed.