FManager24

We automatically send EPS forms via our accounting software however have become aware that we did not apply for employment allowance for the previous 2 years. I am trying to backdate this using the HMRC Basic PAYE app - do I need to upload all the employee details and payroll information for previous years to the app to do this? (These details have already been submitted via Xero). Or can I just complete the employment allowance claim and submit?