1, download the "National Tax General Invoicing System" from the national tax website and install it;

2. After installation, click the icon of the application on the desktop to enter the billing system (user name, password, operator settings, etc. can be asked by the service personnel of the aerospace company in your place);

3. Purchase a general-purpose machine for invoicing (there is a problem with the limitation of the amount of invoicing. It is necessary to fax the approval form for applying for invoicing with the machine to the aerospace company to authorize the amount of invoicing. Because there is only one kind of invoice for ordinary machines, the IRS must authorize the aerospace company after approving your million version or 100 thousand version. ）；

4. Set customer and commodity information in the system, and try to open one after the completion, mainly to adjust the invoice printing position. After debugging, you can make an invoice.