The process for submitting an annual report for a business license registered in Taobao Town is as follows:

1. **Log in to the system**: You need to log in to the official website of Taobao Town or operate through the National Enterprise Credit Information Publicity System. Find the relevant links for filling in the annual report or enterprise information on the login interface.

2. **Select the location of the registration authority**: Before filling in the information, you should select the corresponding option for the location of the business license registration authority to ensure that the information is correct.

3. **Fill in the annual report**: Fill in the annual report according to the prompts, including financial data such as turnover or operating income, total profit, net profit, and total tax payment. Please ensure that the information filled in is true and accurate, and comply with relevant laws and regulations.

4. **Submit the annual report**: After completing the annual report, carefully check the information and submit the annual report. Please pay attention to the submission deadline to avoid missing the statutory deadline.

In addition, if you are unclear or have questions about certain items in the annual report process, you can consult a professional accountant or tax consultant, or contact the service support provided by Taobao Town for more detailed guidance.

In short, according to relevant laws and regulations, all types of companies and institutions, including merchants in online e-commerce industrial parks, must submit annual reports on time. Failure to submit annual reports on time may result in penalties from the industrial and commercial administration department, including but not limited to fines, damage to credit records and other consequences. Therefore, timely completion of annual reports is crucial to ensure the legal operation of enterprises.