The font on the VAT invoice is the font that comes with the VAT anti-counterfeiting and tax-controlled invoicing system. It can't and can't be changed casually. It is a standard song typeface. Even if you download it yourself, you can't use it. If you want to open a VAT invoice, you should first apply for the qualification of VAT general taxpayer for the enterprise, and then apply for using the VAT invoice. After approval, you can install the anti-counterfeiting and tax-controlled invoicing system to invoice yourself.
Special VAT invoices must be issued in accordance with the following provisions:
1, the project is completely filled in, and all the copies are filled in at one time, and the contents and amounts of the upper and lower copies are consistent.
2, clear handwriting, shall not be altered. If it is filled in incorrectly, a special invoice shall be issued separately, and the word "Misfilled and Invalid" shall be marked on the special invoice filled in by mistake. If the special invoice becomes invalid after it is issued because the buyer does not ask for it, it should also be handled as an error.
Reference to the above contents: Baidu Encyclopedia-Special VAT Invoice