Changing Epicor ERP10 standard system code

How can I change Epicor ERP10 standard system code for Purchase Requisition Entry in the Line pane? I would like to change the Due Date from displaying current date to blank everytime making a new line. Please help me.

You can do this using Method Directives.

Here's how to add one.

1. Find and open Method Directives Maintenance (System Management/Business Process Management/Method Directives Maintenance)
2. Click on Method Code, select your business object (Req in your case).
3. Click on Search and select the appropriate method from there (since it is an Add Line event that you want to work with, it should look something like GetNew...Detail). Click OK.
4. Go to Post Processing tab and hit New on the toolbar.
5. Give this directive a name you like and click on Design.
6. Here, in the BPM Workflow Designer, scroll to the bottom of the panel on the left and drag the Set Field icon to the right from the Setters section.
7. Now when this Set Field... icon is selected, it should show you a table with a column called Action. The next part should be intuitive in itself, but I have gone through the steps and written it here anyways.
8. Select DueDate field of the ReqDetail table (under specified field section). Set it to null for the new row here.
9. Save and Exit.

This should do the job, or if it doesn't do exactly what you want. There's always more options in the Method Directives Maintenance section that you can fiddle around with. Good luck.