Dear Raj,
The bank asks for 15cb even if u transfer the funds from your account in India to your account outside India.You will need to provide the bank with 15ca acknowledgement and 15cb.
You will need to give the following details to your chartered accountant for form 15cb.
1)Name and address of the remitter (your name and address)
2) PAN of the remitter
3) Name of the recipient of the remittance
4) PAN of the recipient
5) Place of business
6)Country to which remittance is made
7) Currency
8) Amount of remittance in foreign currency and in INR
9)BSR code, branch and address of your bank
10)Nature of the remittance
Based on the form 15cb you will have to upload form 15ca and give the acknowledgement to the bank
Regards,
Fatema