It would be under Veterans' Benefits category, if your payments were for education, training, or subsistence under any law administered by the Department of Veterans Affairs (VA). If not, then it would be under Employer-Provided Assistance.
If you pay qualified education expenses with certain tax-free funds (GI Bill, Pell grants, military tuition assistance, employer-provided assistance), you cannot claim a deduction for those amounts. You may only claim expenses that are not covered or exceed the amount of tax-free assistance you received.
For more information, please see this IRS link: https://www.irs.gov/publications/p970/ch01.html#en_US_2016_publink1000178026