When filling in the Amazon Business Insurance application form, you need to provide some necessary information, including:

1. Company name and address: Fill in the company's full name, address and contact information and other basic information.

2. Company type: Fill in the company's type, such as limited liability company, partnership, etc.

3. Company size: Fill in the company's number of employees, annual turnover, annual sales and other information, so that the insurance company can assess risks and formulate insurance premiums.

4. Insurance type: Fill in the type of commercial insurance you need to purchase, such as property insurance, liability insurance, employer liability insurance, etc.

5. Insurance period: Fill in the insurance period, such as one year, two years, etc.

6. Insurance amount: Fill in the insurance amount of each insurance, such as the insurance amount of each property insurance, the compensation amount of each liability insurance, etc.

7. Other additional information: Fill in other additional information that may need to be provided, such as company history, business scope, industry risk assessment, etc.

When filling out the application form, you need to carefully check the information you fill in to ensure it is accurate. At the same time, it is recommended that you confirm again whether the information you fill in is correct after filling out the application form, and submit it to the insurance company for review and processing in a timely manner.