How do I rectify running my company on the wrong Tax / NI Rates?
Firstly, you will need to make sure you are running on the most up to-date version of the software and that the correct tax year is selected in company details. Once this has been amended anyone on a cumulative Tax Code will have their tax automatically rectified during the next payroll run. If there has been a change in the NI rate, or if you have anyone on a week 1/month 1 Tax Code, please contact Support or call 0844 815 5671.