The following documents are necessary to convert your NRE/NRO account to a resident trading and Demat account:
Account modification form Required to update the bank and address details of your Demat account
Trading account closure form Required for closing the NRI trading account (2 copies if you're holdings both NRE and NRO accounts)
Trading application form Required for opening a resident trading account
Photographs One. Paste on the KYC form and sign across it.
PAN card 1 copy, self-attested
Address proof 1 copy, self-attested - (Driving License, Voter ID, Passport, Aadhaar Card, Bank statement, etc. -Any 1)
Income proof 1 copy, self-attested - (Latest salary slip, ITR, Form 16, 6-month bank Statement, etc. - Any 1) -Needed for derivatives trading (FO, CDS, and MCX)
Bank proof Personalized cancelled (name printed on it) or bank statement or bank passbook copy (With visible bank account number, MICR, and IFSC code)

Note: Only one account, either NRE or NRO, can be converted to a resident account. We will execute a closure cum transfer for the second account because a brokerage firm cannot open multiple resident trading accounts with identical PAN details.