If you find that there has been an error in a previous tax year to an employees pay, you must correct the effected pay run. This ensures the correct PAYE and NI deductions opposed to trying to account for it in the current pay period.
This also includes any recalculation of figures due to a change of dates. For example, statutory maternity pay (SMP).
NOTE:
You don't need to issue a new P60, HMRC stipulates that an employee can only receive one P60 per tax year,
Once the correction has been made in Sage Payroll, you must notify HMRC of the new figures. This is done by sending a Supplementary FPS.
You need to notify HMRC if the changes relate to information normally included in an Employer payment summery (EPS) submission. You don’t process this through Sage Payroll.
Cause
Resolution
Correct the payroll
Edit the pay period that contains the incorrect figures. For more information, read Amend a completed pay run.
Inform HMRC of the changes
You need to inform HMRC of the corrected figures. This is done by sending a supplementary FPS. For more information, read Supplementary FPS.
Additional information
A supplementary FPS doesn’t include the following information:
Reclaim figures of statutory payments
Small employer benefit status
CIS suffered amount
Employment allowance figures
An EPS includes this information, rather than an FPS. You can't submit asupplementary EPS in Sage Payroll. Instead, use the HMRC's basic tools. For more information, read their Basic PAYE tools user guide at gov.uk.