Circular No. 99/2003/TT-BTC of October 23, 2003 guiding amendments and supplements to The Finance Ministrys Circular No. 120/2002/TT-BTC of December 30, 2002, which guides the implementation of The Governments Decree No. 89/2002/ND-CP of November 7, 2002 on the printing, issuance, use and management of invoices