A few days ago I received a notice from SARS headed "FINAL NOTIFICATION OF OUTSTANDING DEBT", which contained a breakdown of amounts related to late payments of my VAT returns over the past number of periods.

How do I pay this amount on efiling?

I have tried using the "Create Additional Payment" under "Additional Payments", but it won't accept my VAT number in the Payment Reference Number field, and the notice does not have any other reference number other than my VAT number and a case number (which I also tried).