If your Employer Monthly Schedule (EMS) is returning blank figures it is due to it not being run for the period of time which you actually paid your employees. To be able to ascertain when this was actually done in your system the simplest thing to do is to head to your audit trail report and just run this:
You will be asked to print the EMS for the tax year ending 31 March. Please select the current financial year and then preview the report.
The report will return information to you in terms of the month and paye period in which your pay was finalized and also a date. Use this information to then go back and run your EMS for the same date and it should enable you to populate the EMS with figures.