The 'setup wizard' can be used in 2 seperate ways, choose the way that works best for you.

Step  2:
To help you easily create your pay history, choose the window that works best for you.

Step 1: check the dates and alter if required.

If your employees pay does not change often, select this window.

If your employee's pay changes often, and/or you have easy access to their year to date figures, select this window.