Lance Cpl. Caleb Medeina, a volunteer tax preparer and Petty Officer 2nd Class John Lawrence, the noncomissioned officer in charge of the base tax center, look up tax information. The center is open now through April 20, 2015. (U.S. Marine Corps photo by Lance Cpl. Adam Korolev) - Lance Cpl. Caleb Medeina, a volunteer tax preparer and Petty Officer 2nd Class John Lawrence, the noncomissioned officer in charge of the base tax center, look up tax information. The center is open now through April 20, 2015. (U.S. Marine Corps photo by Lance Cpl. Adam Korolev)