Hi Jonlin,
Thank you for your post and welcome to the MYOB Community Forum. I hope you find plenty of useful information.
This would refer to the Limit settings when setting up a Payroll Category. In your case, you may need to check all linked Payroll Categories under the Type: Deduction, Superannuation and Expenses.
We recommend try focusing on 1 employee having the message, go to:
- Cards > Card List > Employee Card
- Payroll Details > Deductions.
- Open a linked Deduction Category and check the Limit of the Category:

You can read up on the limits of the categories by hovering your mouse over them:

This will be a matter of repeating for all linked Superannuation and Employer Expenses.
Note that payroll categories are “Global”, and any limits set up for 1 employee will affect all others linked to the same category. If a limit was set for a specific employee, it's recommended to create a new payroll category for that employee to be linked so that it doesn't affect other employees.
Do let us know how it goes.
Cheers,
Shella