I have an ERP solution that contains over 15 modules like:
General Ledger, Stock Control, Sales, Purchases, Point of Sales, Human Resources, ... etc.
In case I chose to have "User Story" + "Subtasks" under each "User Story". Knowing that one "User Story" should have one screen + details on behavior of such screen & relation to other screen(s) (or module(s)). This means that one module should include several screens & one screen should be under single "User Story". Now the question is: What is the best approach to group modules in JIRA? Any other suggestions that best fit ERP solutions knowing that modules is basic building block in it & considering that Offerings of such ERP solution is available partial like some customer would buy 4 module out of available 15 modules (e.g. General Ledger, Stock Control, Sales, Purchases with NO need for Human Resources module)?