Thanks for bringing this up to the Community, beverley.
I've got some insights about recording a half day of sick leave in QuickBooks Online (QBO).
An employee who is unable to work due to illness for three or more days (including non-working days) is eligible for paid sick leave. As such, it is not possible to record a half-day of sick leave as part of this policy. This condition is meant to ensure that the employee is genuinely unable to perform their duties for a reasonable length of time and to prevent any misuse of the sick leave policy. To have a paid sick leave, an employee should have been sick for more than 3 days in a row including non-working days. Therefore, recording a half-day sick leave isn't possible.
Just in case you want to run a payroll report, you can check out these references for your guide:
I'm always here to provide further guidance if you have more concerns about managing sick leave for your employees in QBO.
