Your TNEB customer number, also known as your TNEB account number, is a unique identification number assigned to your electricity connection. You can find your TNEB customer number on your electric bill or in any communication from TNEB (Tamil Nadu Electricity Board).
If you are unable to find your TNEB customer number, you can try contacting TNEB customer service for assistance. You can do this by phone, email, or in person at a local TNEB office.
I hope this helps! Let me know if you have any other questions.