If you need to make changes to driver payroll after processing the payroll record(s), there is a quick and easy way reverse the desired payroll run.
After you make the necessary changes to the data/dollar amounts that need to be corrected:
Navigate to Driver Payroll-->Utilities-->Reverse Payroll. Select your driver and payroll date and then press 'Get Data.' Highlight the record(s) you would like to reverse and then click 'Reverse.' You will need to click 'Yes' on the confirmation screen.
The payroll runs that were reversed will now be available again to process on the 'Trips To Pay' tab in the main payroll screen.