I may be going into default on my student loan with Sallie Mae. I receive a combination of Social Security and SSI for a total of $705 a month, or $8460 a year total. Can Sallie Mae or any other entity take all of my Social Security? Or is the full amount of $8460 a year exempt, because it is under $9000 a year?

If this is a government student loan they can and will take as much as they want.