Thank you for your prompt reply. I'll share the steps on how you can add different pay rates for your employees.
The first thing we need to do is to enter the additional pay rate.
Here's how:
Highlight the Employees tab.
Select Employees.
Search for an employee you'd like to add a different pay rate and click it.
Under the Actions drop-down menu, choose Additional pay.
Click the + sign beside Pay types ready to add.
You'll be provided with different pay types. Choose one and name it as you'd like.
(Optional) You can enter a default rate as well.
Hit Save.
Be advised, any additional pay rates you create will be available to every active employee you have. So there's no need to repeat the steps above for each employee. You simply need to follow up to step 4, then enable the additional pay rate you created by toggling a switch.
Now when you run payroll, the additional pay rates won't appear initially, but you only need to click the Edit link beside the employee. It will show you a page that will allow you to edit how many hours are there for each rate.