1, the specific criteria are as follows: self-declaration: the monthly sales of self-employed households have not been approved by the tax authorities, and self-employed households fill in the declaration form to declare tax. Self-employed individuals who declare themselves mainly need to declare the time. Don't forget that the time of declaration leads to overdue declaration.

2. Yes, according to the taxes levied by national tax authorities on individual industrial and commercial households, there are value-added tax and consumption tax. VAT payable = sales × collection rate. Value-added tax: if the owner is engaged in the production and sale, wholesale and retail of goods, or provides processing and repair services, it is the taxpayer of value-added tax.

3. Jade jewelry transactions need to pay 10% consumption tax and value-added tax (the general taxpayer's tax rate is 17%, and the small-scale taxpayer's value-added tax rate is 3%). Consumption tax (consumption behavior tax) is the general name of all kinds of taxes that tax the turnover of consumer goods.