Is there a way to attach input data from the form to the custom url once the form is submitted?

For instance, when a someone inputs their phone number and hits submit, can the phone number be attached to the url in token format? 

Ex. http://www.redirecturl.com/action.php?phone=phone_from_form

Hi,

You can try to set your form Thank You Page to custom URL and then pass the value of the field to your URL. For example, http://www.redirecturl.com/action.php?phone={fieldName}. You can check the name of the field in your form on it's Properties. 

To set the Thank You page to a custom URL, you can check the instructions provided in the demo below.

Do let us know if you have further questions.

Regards.

Thank you, it worked!