Legal basis: Article 24 of the Detailed Rules for the Implementation of the Law of People's Republic of China (PRC) Municipality on Tax Collection and Management shall, within/0/5 days after receiving the tax registration certificate, submit its financial accounting system or financial accounting treatment measures to the competent tax authorities for the record. Taxpayers who use computers to keep accounts shall submit the accounting software, operating instructions and related materials of the computerized accounting system to the competent tax authorities for the record before use. The computerized accounting system established by taxpayers shall conform to the relevant provisions of the state and can accurately and completely calculate their income or income.