When you have unneeded pay calendars, this message appears in the Summary tab: Warning: Not all pay runs completed.
This can be because:
Your pay frequency has changed, from weekly to monthly for example
A pay calendar was set up in error
Set up a Pay Calendar for how frequently employees get paid. This could be monthly, weekly, 2 weekly, or 4 weekly.
If the calendar isn't assigned to any employees and you haven’t completed a pay run for it, you can remove it.
From Settings, select Pay Day Settings.
On the relevant calendar, select Manage Frequency and Remove Frequency.
When prompted, select Yes.
CAUTION: If the button on the pay calendar only says Edit Pay Days, then you have completed a pay run using this pay frequency. You can only delete the calendar after payroll year-end.
The work around is to move it to the last period of the current tax year.