Hello there!

My name is Trevor and I’m a senior product specialist with Calendly support. 

From this screenshot it looks like you are trying to send the user to a Calendly event after they fill out your Hubspot form, so I’d like to provide 2 set up methods for this use case! 

1. One of the options on that screenshot is “Hubspot page or External URL” so you could copy the Calendly scheduling link and add it there as an external link to route them there after filling out the form. 
2. You could also integrate your Hubspot form into Calendlys routing forms. This would allow you to build that logic of (If invitee answers A, send to event A) in the Calendly routing forms settings and embed the Hubspot + Calendly routing form to your website so that invitee lands on form, fills form out and is sent to matching event based on answer. 

Here is a help center article on setting up your Hubspot + Calendly routing form and embedding it after the HUbspot form code (If you have embedded your Hubspot form onto a website versus just sending out the link)

Hope this information was helpful! If you have any other questions please don't hesitate to reach out, otherwise have a wonderful day!