Hi
Your brother may apply for a low deduction certificate to the jurisdictional AO. This would be done online through income tax portal.
The lower rate of TDS shall depend on his taxes payable in India. Once such certificate is obtained, the tenant shall deduct TDS on such rate as prescribed in the certificate.
If there are no taxes payable, he may apply for a NIL deduction certificate as well.
We may assist you with the same.