When seeking an E-2 visa, you will need to demonstrate that you both have invested substantial funds in a business and that you will be engaged in managing that business. Common types of documentation include:

A business plan detailing the type of business and its potential to be profitable.

Documentation that reflects the amount of capital invested, which could include bank account records and transaction records.

Documentation that reflects the legitimacy of the business, which could include tax returns, contracts, leases, and employment records.

Documentation that demonstrates your active role in the business could include documentation of your managerial control as well as participation in the day-to-day operations of the business.

You may also want to consider adding any documentation that supports the narrative that the business is not marginal and can continue to grow.