You have to install the desktop application on the windows itself on the cloud which is running tally.
If Tally and Desktop application are on same system, IP would be http://localhost
Port will be where ODBC Server of tally is enabled in your Tally Configuration.
NOTE: Make sure to add http: before localhost. Else it will not work.
Save the settings and switch to add company.
Refresh the desktop application in Add Company from here.
You will see connected status list of companies are loaded in tally but are not yet synced with us.
This list does not include companies already synced with us.