Proof of constitution like Partnership Deed, Memorandum of Association (MOA) / Articles of Association (AOA), Certificate of Incorporation.
Photo id Proof of Promoters/ Partners/ Karta of HUF.
Details and proof of place of business, like rent agreement or electricity bill.
Cancelled cheque of your bank account showing name of account holder, MICR code, IFSC code, bank branch details, and few transaction details.
Authorized signatory like List of partners with their identity, address proof in case of partnership firm or List of directors with their identity, and address proof in case of company.