Tuition Assistance Top-Up (TATU) is an augmentation to the Montgomery GI Bill (MGIB) Active Duty (MGIB-AD) or Post-9/11 GI Bill benefits. It permits the Department of Veterans Affairs (VA) to pay a benefit equal to the difference between the total cost of a college course and the amount of Tuition Assistance (TA) that is paid by the Air Force for the course, up to the Veteran's rate.

Retired Air Force Reserve Service members are not eligible for TATU.

For more information, please visit the Tuition Assistance Top-Up webpage maintained by Veterans Affairs:
https://www.va.gov/education/about-gi-bill-benefits/how-to-use-benefits/tuition-assistance-top-up/

https://www.benefits.va.gov/BENEFITS/factsheets/education/TU.pdf