Ensure that you have performed these tasks before you launch the wizard:
Imported Benefits, Taxes, and Additional Earnings using Components on the Workforce Configure page. Importing the component makes it available in the wizard.
Configured Options and Tiers on the Configure page to set up Benefits and Additional Earnings (Options) and Taxes (Tiers), which creates the options and tiers.
Then you're ready to launch the Benefits and Taxes Wizard to define each option for Benefits, Taxes, and Additional Earnings.