How to create a web form
The Merchant Facility tab can be found within the Payments2Us menu (Top right picklist in Salesforce - Select Payments2Us), or it can be found under the "More" at the end of the tabs. (In Salesforce Classic - It can be under the "+" at the end of the tabs)
Once you have clicked on the Merchant Facility Tab, select the appropriate List view (Example - "All Merchant Facilities") and click into Merchant Facility you wish to update.
The form must have:
- Merchant facility
- Credit Card types
There are many options available to tailor to your requirements.