If you have purchased taxi butlers, you can easily indicate per "venue" for which debtor in taxiID the jobs are meant.
Connect your butler to a debtor in the following steps
Login to your taxibutler portal, https://portal.taxibutler.com/#!/login
Go to Venues
Open your location and press edit (top right)
In a new tab login on your taxiID portal, https://www.taxiid.eu/login
Go through the menu account details / customers
You can see the Customer ID here, copy it
Go back to your taxibutler portal and enter the customer number in the Business Client Id field
Do a test with the linked Butler!