Creating a new income or deduction won't change past paycheques.

• The newly created income or deduction will appear in new paycheques, not in paycheques already existing
• If you want the new income or deduction to show on prior paycheques, adjust them
• Speak with your tax advisor or accountant before adjusting prior paycheques

Employee not set up for this new income or deduction

1. Open the Employee records, and go to the Income tab.
2. Put a checkmark in the Use column next to the Income or Deduction.

A linked account is missing for this new income or deduction

1. Go to Setup, Settings, Payroll, Linked Accounts, Incomes (or Deductions).
2. Set up Linked Accounts for the new Income or Deduction.
3. Click OK.

An Expense Group is missing a linked account

 NOTE: Use this solution only if you use expense groups 

1. Open the Employee Records, and select the Personal tab.
2. Verify you've assigned the Expense Group to the employee.
3. Go to Setup, Settings, Payroll, Linked Accounts, Expense Groups.
4. Open the proper expense group.
5. Select a linked account for the new income.
6. Select OK to save the linked account, then select OK again to save all settings.

How to create a new payroll income or deduction?
How do I create a new payroll deduction?
A newly created or existing income doesn’t show up under paycheques