The tax payment certificate according to law usually refers to the tax receipt or tax payment certificate printed by the tax bureau after tax collection;

The proof of payment of social security funds mainly refers to the invoice paid by the laborer in the social security bureau or the tax bill collected by the local taxation bureau;

3. The social security fund, also known as the National Social Security Fund, refers to the social security fund centrally managed by the central government, managed by the National Social Security Fund Council (hereinafter referred to as the Council), and consists of funds and equity assets allocated by the reduction of state-owned shares, funds allocated by the central government, funds raised by other means approved by the State Council and their investment income. From the international situation, there are two sources of social security funds. One is collection. Social security tax, and the second is the government's financial social welfare expenditure. ? 5. Basically, all countries in the world use both channels, but with some emphasis. For example, the United States mainly relies on social security tax, and its social security tax revenue accounts for a large proportion of the total tax revenue, which is the second largest tax revenue after personal income tax, while Canada's social security tax revenue accounts for a relatively low proportion of the total tax revenue, and its source of funds for implementing social security plans relies more on non-social security tax revenue. 6. The sources of social security funds are diversified, and raising and accumulating social security funds through multiple channels is the key to perfecting China's social security system. The sources of social security funds in China are mainly two aspects: one is the social insurance premiums paid by employers and employees themselves; The second is the social security budget of governments at all levels, that is, the combination of social pooling and personal accounts. ? 7. When these two sources are stable, social security funds will be basically guaranteed. In addition, we should expand the coverage of social security and open up new financing channels.