Lance Cpl. Vicki Harris, an administrative specialist, helps a family prepare their taxes at the Quantico Tax Center aboard Marine Corps Base Quantico on April 2, 2014. The tax center offers free tax preparation assistance to Marines, family members and military retirees. - Lance Cpl. Vicki Harris, an administrative specialist, helps a family prepare their taxes at the Quantico Tax Center aboard Marine Corps Base Quantico on April 2, 2014. The tax center offers free tax preparation assistance to Marines, family members and military retirees.