You would need the following :
1. Proof of Business (Certificate of Incorporation, Partnership Deed, Service Tax, GST registration document)
2. Firm/Company PAN (Not for Proprietorship)
3. Promoter's PAN (Proprietor/Director)
4. Cancelled cheque / Bank account statement in the name of the business
5. Authorized signatory address proof (Passport/AADHAAR/DL/EC)