Social Security (SS), Supplemental Security Income (SSI), and Social Security Disability Benefits (SSDI) are three federal benefit programs that can provide income to Americans who aren't able to work. SS, SSI, and SDI are all are managed by the Social Security Administration. Each of these programs, however, have different purposes and eligibility requirements. However, when it comes to taxes and financial aid, it can be confusing to understand how each work. For example, do you need to include SSDI benefits received on the FAFSA? But how exactly do these programs work? And how do they play into your tax bill? In this article, we’ll look at each one and their impact on your paycheck, taxes, and FAFSA.