You do not need to provide any documents to register your company in the US!
All Firstbase.io needs is that you fill out your personal and business-related information in your account, preferably before the payment, so that we can start the incorporation right away.
We do ask for your SSN or ITIN number if you have one. However, you do not need to provide a physical copy of this document.
Please bear in mind that during the bank application, you will be required to provide a picture of your passport. Therefore, make sure this document is valid by the time we send the bank application which is usually the last step of the registration process.
Do you still have any questions? Our support team will be happy to assist!