How do I submit a late IRP5 for a previous tax year on SARS eFiling?

I have submitted my tax return for this year but have been told they won't pay out until I submit my outstanding tax returns from last year (fair enough). I wasn't earning a salary for most of last year but I believe I still need to submit the IRP5 which covers the last month of my employment with my previous company from that year. I got hold of my previous company and they sent through the form really quickly but I can't figure out how to submit for a previous year on SARS eFiling. The SARS helpline just tells me that I need to submit it but not how I can do that.

You need to request the 2014 tax return via SARS eFiling from the "Returns Issued" menu.
If you indicate in the opening questions that you had 1 tax certificate (IRP5) issued for the year and then the iRP5 should automatically be populated in the tax return.