!--a11y-->
Test Connection 
After you define a physical destination, you must test the connection between the SAP system and the external tax system.
...
1. In Define Physical Destination in Customizing, select your connection.
2. Choose Test Connection.
If you encounter any errors, verify that the following conditions are true:
· The connection type is TCP/IP.
· Program location and host name are correctly specified.
· The directory path and the name of the executable program are correct.
· The gateway host and service name is correctly specified.
· The external tax package has been installed correctly and is the correct version.
· The external tax package’s API for the SAP system tax interface is installed correctly and is the correct version.
· The SAP system RFC libraries are the correct version.
· The correct permissions are set for the user account.
· The user has read/write authority.

If this test fails, stop the installation. This test must be successful in order for the SAP system to communicate with the external tax package.
