Invoice issued by Shandong Provincial (Shandong) Taxation Bureau 202 1 Shandong tax invoice word is the code of the invoice, which is used to identify the issuing area of the invoice. Lu stands for Shandong Province, and 202 1 stands for invoice year. The code is determined according to the regulations and management of the tax bureau, aiming at classified management of invoices. Through the identification of tax invoice words in Shandong, it is convenient for taxpayers to apply for and use invoices, and it ensures the supervision of the tax bureau on invoices.