Hi, Have you tried contacting the school you attended when you resided at both addresses?
 
If you don't have their contact info handy, you can research it in SchoolFinder: http://www.education.com/schoolfinder/
 
If the school doesn't keep archived records, try the district or the Mississippi Department of Education.
 
You might alternatively consider contacting the Internal Revenue Service for your past tax records that include those two addresses: http://www.irs.gov/  
 
If you rented at those locations, your rental agreements might also qualify as legal documents. If utilities were in your name, that's another option (via old bills you have filed away, or the utility company records).
 
Good luck -- I hope you are successful in compiling the legal documentation you need.