Hi joonjung, this is a known issue that is being worked on at the moment.
In the mean time you are able to work around this issue by adjusting the screen.
Please hold down the CTRL button (Command button for MAC) and then press either the + or - button once.
This will adjust the screen as well as unlock the drop down menu so you can select Monthly for your pay schedule.
Try that out and see how it works.
Mine is stuck with Monthly and can't choose anything else.
I tried CTRL button (Command button for MAC) and then press either the + or - button once
it only changed the screen letter size bigger or smaller.
Could you suggest something else?
The steps provided by Kristian_S only work if you have already set up another pay schedule for the new employee. Also, the steps are specific for Mac users. For PC or laptop users, pressing the Alt key might work.
Meanwhile, we can create another pay schedules by following these steps:
Note that the employees under any pay category rates can be configured to accrue leave, super, and other pay settings.
You can also use this guide link for QuickBooks Online Payroll powered by KeyPay.
If you have additional questions about this, you can always get back to us for assistance. Have a great day!