Invoice is an important voucher for merchants to obtain income. The tax authorities determine your business status according to the amount you invoice, and then tax according to the tax rate stipulated in the tax law!

The deadline for monthly tax return is before 15, because you paid last month's tax. Pay taxes next month, for example, the tax paid this month is 10!

There are many books on taxation, in fact, they are mainly tax laws. Just look at it, such as tax collection and management law, personal income tax law, provisional regulations on business tax, provisional regulations on value-added tax and so on!