1. First, corporate customers need to open corporate online banking services in ICBC and sign corresponding agreements.

2. Log in to ICBC Online Banking and click My Account-Account Management-Electronic Tax Service in the menu bar.

3. Fill in the relevant information in the pop-up open page, including basic enterprise information, tax registration information, agent information, etc. After completing the form, click the "Submit Application" button.

4. ICBC will review the information submitted by customers, and after the approval, ICBC will import the tax registration information into the tax system.

5. The customer needs to go to the tax bureau to issue the password certificate of the electronic tax bureau, and then import the certificate into the electronic tax system to complete the authentication.

6. After the certification is completed, corporate customers can pay taxes and inquire about tax information online on the electronic tax system of ICBC.