The role of invoices
Invoices are purchased at the tax bureau, and merchants can only purchase invoices at the tax bureau after paying taxes. The invoice is the proof that the seller has paid the tax. Small traders have to bear taxes, so the value of what they sell is 10 yuan, so they have to bear certain taxes. If the tax is 2 yuan, he gets 10 yuan. If a receipt is issued, the 10 yuan he received can be put into his pocket.
The company didn't know that the other party had paid the tax until it saw the invoice. If there is no invoice, the tax bureau later found that your company did not get the invoice. The tax on this transaction was originally borne by the merchant, and now your company has to bear a higher fine.