A Columbia Card allows us to verify the guest lives and pays the CPRA tax. Columbia Cards may be obtained at the Maggie J. Brown Welcome Center, located at CA Headquarters, 6310 Hillside Court, Suite 100, Columbia, MD 21046. Address verification in the form of a driver’s license or imprinted personal check and dependent children’s birth certificates is required to obtain the Columbia Card. For more information, call 410-730-1802.