Go to the local tax authorities. Check whether the network connection of the billing system is normal, or go to the local tax authorities to increase the offline billing cycle and upload it again. Legal basis: Announcement of State Taxation Administration of The People's Republic of China City, People's Republic of China (PRC) on Relevant Matters Concerning the Use of VAT Electronic Ordinary Invoice IV. The tax bureaus of all provinces (autonomous regions and municipalities) should make use of various channels to effectively publicize and explain matters related to the use of VAT electronic ordinary invoices. It is necessary to take multiple measures and make solid progress, timely and accurately inform taxpayers and third-party electronic invoice service platform operators of relevant policies and regulations, and urge them to complete the upgrade of electronic invoice service platform on time.