The operation steps of Audit Star to input the relevant data of enterprise declaration number are as follows.

1. Log in to the Audit Star account and enter the corporate homepage.

2. On the homepage of the enterprise, click the "Fill in" button to enter the fill-in page.

3. On the report filling page, select the report that needs to be filled, such as basic enterprise information, financial statements, tax bills, etc.

4. According to the report requirements, enter relevant data in turn.

5. After input, click "Save" to save the data.

6. Auditors can view the data reported by enterprises on the Audit Star platform and conduct audits.