How do I add a sick note to my sickness

A sick note can be added at any time during or after the sickness.  Go to Actions > Sickness > Sick Notes and click the sick note numbers next to the Sickness Ref you want to add Sick Notes for.  The Sick Note can be a Self Cert, Doctors Note or a Medical Certificate.  All sick days should be covered by a sick note.  One or more sick notes can be added to cover the period.