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Team, I have a beforeLoad function to create one subtab and one custom field on Invoice. I am setting default value to this custom field.
In beforeSubmit, when I try to access the value of this field, it returns empty string.

cForm.addTab({
                        id: 'custpage_mytab',
                        label: 'MyTab'
                    });

var TrnStatus = cForm.addField({
                            id: 'custpage_trnstatus',
                            label: 'Transaction Status',
                            type: ui.FieldType.TEXT,
                            container: 'custpage_mytab'
                        });
                        TrnStatus.updateDisplayType({
                            displayType: ui.FieldDisplayType.INLINE
                        });

*Question*: In BeforeSubmit, is it possible to access value of custom field created in BeforeLoad ?

The user can't edit it, so i'd probably just use the logic you used to populate it in the first place