From another thread:
[Quote=Erin’s Dad]
Here you go: http://talk.collegeconfidential.com/financial-aid-scholarships/1720008-fafsa-and-ssdi-disability.html
SSDI is not reported on the FAFSA. Other forms of disability income are reported, but SSDI is not. Should you be selected for verification, you may be asked to detail all forms of income, and all SSDI would be reported there. However, it still would not be counted as income for FAFSA purposes - it is simply used as documentation of how the family was able to live on the reported income.
@kelsmom is a college FA expert.