if the tax number of the ordinary invoice is filled incorrectly, it may lead to investigation by the tax bureau. The tax number is the only sign for an enterprise to register with the tax bureau. If it is filled in incorrectly, the tax bureau may not be able to accurately check the taxpayer's information, which will further affect the enterprise's tax declaration and payment. If the tax bureau finds that the tax number filled in by the enterprise is wrong, it may require the enterprise to issue a new invoice and impose tax penalties on the enterprise. Therefore, when filling in the invoice information, taxpayers must carefully check the accuracy of the tax number and other related information to avoid unnecessary troubles and losses. If you are not sure whether the tax number is correct, you can check it by calling the tax bureau or viewing the tax bureau website.