To Enable ODBC in Tally follow the below steps

1. Open Tally in “Run as Administrator” mode
2. Go to Gateway of Tally > F12: Configure > Advanced Configuration . The Advanced Configuration screen appears.
3. The Advanced Configuration screen appears as shown below:

4. Enable ODBC
   • Enable ODBC server? to Yes.
   • Specify the Port number that Tally.ERP 9 can use to run as an ODBC server client.

5. Press Ctrl+A to accept.
6. Restart the Tally to get the updated changes
7. Now you can see bottom of tally for ODBC enabled

Now Tally is ready with data connectivity thru ODBC with specific port.