Indicates that the earned income from lessons is derived from the tutor's default payroll settings.

Indicates that the earned income from lessons is derived from a "Category" payroll override found under "Calendar > Categories".

Indicates that earned income has been manually applied to the tutor's payroll account.

Indicates that the earned income was triggered by a tutor substitution.

Indicates that the earned income from lessons is derived from a "Tutor's Category" payroll override found under "Tutors & Admins > User Details > Payroll > Category Payroll Settings".