How can I provide extra inputs to the rate's element?

If you have configured the rate to use elements, you typically pass the rate's amount to the element's input value. But you can pass other values too.

For example, you can pass the plan name, to the rate element's input value, depending on your requirement. You do this from the Extra Inputs tab in the Additional Information section when you create or edit a rate.

Assuming that you have already created an instance of the Extra Inputs formula type, you select the formula's return variable and then select the element's input value to make the mapping. You can even choose to update the input value only when the enrollment ends.