1, the national tax invoice is different. 2. For the online invoice of national tax, you need to download the invoicing software from the website of Henan State Taxation Bureau. After the upgrade, there is no need for an electronic key now. You can enter "12366" in Baidu to enter the website of Henan Provincial State Taxation Bureau. After entering, click "Tax Hall"-Software Download-General Invoice Issuing Component _ 1.0.0.5 to download and install. It should be noted that you have to register with the national tax department first, and then apply for using the general machine to make invoices, which can only be issued after being approved by the tax department. Password and password should be asked to the local tax authorities.