The documents have to be submitted when the ICICI officer reaches out to you. Here’s a detailed list of documents that need to be submitted.
Sole Proprietorship & HUF - https://help.bankopen.co/documents-for-sole-proprietorship-firm-and-huf
Public and Private Limited - https://help.bankopen.co/list-of-documents-for-public-and-private-limited-companies
Trust, Society & Club - https://help.bankopen.co/list-of-documents-for-trust-society-association-and-club-tasc
An account opening cheque is also required along with the documents. The cheque value will change depending upon the account variant and type of business you own.