Customs Field for Invoicing purpose

Hi,

I would like to add Custom Field in Monarch to easily generate invoices per request from the Customers and per SA agreements

1. Quickly applying correct rate for ESY and new School year service during renewal season

2. Automatically generating invoice to the Customers to meet their need;

3. Reducing misalignment between how the therapist bill their hours and how the Customer would like to see in their invoice.