When I was applying for SSDI, there was a very lengthy history done on me on all the jobs I've had in my life. there had to have been over 30 that I needed to report, including the duration, the pay, the ability I had or did not have to do the job and keep it. This is in some ways related to how much they will determine or set your monthly check at. I like that when I'm well, I can earn the exact same amount as my check each month, and they know this is what I'm capable of.