According to what you said, you should have a lot of income without invoicing. The national tax mainly checks whether the income in your account is consistent with the income you declare, and whether there are acts such as not issuing invoices according to regulations. In addition, if the enterprise income tax is levied by the national tax, it will also check whether your assets have been disposed of and whether there are tax-related matters. If it is cancelled, the local tax should also check whether your undistributed profits are distributed and pay a tax.

If it is not a particularly large business, or if there are statements, the national tax will generally not be particularly detailed.

In addition, if you move in the city, you only need to change the tax registration. Why should you cancel it?