The contract confirmation process of electronic tax bureau is an online service provided by tax authorities to facilitate taxpayers to handle taxes. In this process, taxpayers can upload the contract through the tax online service system or the tax authority window. The tax authorities will check and verify the uploaded contract and confirm its implementation. After the confirmation is completed, the tax authorities will sign a contract and negotiate with the taxpayer to issue an invoice. In the whole process, the tax authorities will inform taxpayers in time, generally by mail or other means, asking taxpayers to review the contents of the contract and understand the invoicing situation. This process can ensure the smooth contract confirmation process between taxpayers and tax authorities and promote the convenient handling of tax affairs.