automation on wix paid plans

Hello, I am setting up a paid plan. I would like when someone signs up for a paid plan it gives an option to submit their mailing address automatically. I see I can make a task that they fill out a contact form but I don’t know how to view or edit the contact form to address my needs. Help!!!

https://support.wix.com/en/article/corvid-tutorial-using-the-paid-plans-api-to-customize-ordering-and-payment
https://www.wix.com/corvid/reference/wix-paid-plans.html#targetText=The%20wix%2Dpaid%2Dplans%20module,described%20in%20About%20Accepting%20Payments.
https://support.wix.com/en/article/corvid-wix-paid-plans-plans-collection-fields
https://support.wix.com/en/article/setting-up-payments-for-paid-plans