If it is approved as a fixed tax, monthly statements and standard bookkeeping are not required. Generally, the self-employed will be approved as a fixed tax, but this is up to the tax authorities. You can apply to the tax authorities to pay the fixed tax and ask them to approve it.

How much is the tax?

This depends on your situation. Generally speaking, the "fixed tax" approved by tax mainly refers to your business area, rent, number of employees, local average salary and industry profit level.

Can we not pay taxes first and not file taxes, so let's just leave it alone?

You can't. The tax obligation of fixed amount tax begins on the approval date of your business license. Even if you fail to register tax in time, you should count from that date, and the unpaid tax must be paid first before the tax can issue you a tax registration certificate.

What will be the consequences?

Failure to register or pay taxes on time is illegal, and it is not only necessary to make up for it, but also a late fee may be imposed.