At this time, embedding a tracking code is not supported. However, there are workarounds.
1. Create a separate Final step page.
You can create a ‘thank you’ page, add the tracking script to that page, and set the URL in Settings > URL Settings as ‘Final step URL’ so the user will be forwarded there after successful booking.
2. Add the tracking script directly to the booking form.
Also, you can link the analytics script to any step of the booking form using the description text field. The script will be executed each time when the user goes to that step of the booking form.
Tip: Remove all line breaks from the script, make the script be on one line. Otherwise, it will not work and will break the booking form.