Summary of the Forever GI Bill - Harry W. Colmery Veterans Educational Assistance Act
https://www.benefits.va.gov/GIBILL/FGIBSummaries.asp
Go to www.ebenefits.va.gov and register for a "premium" account. Go to the Military Personnel File (DPRIS) link to request a copy of the DD-214. If you served before records were scanned into the system, try https://www.archives.gov/veterans and click on the "Request Military Records Online" tab.