ALM10000 | In year adjustments to a pay bill
From HM Revenue & Customs · Apprenticeship Levy Manual
If an employer makes an adjustment to a previous month’s pay bill, which in turn affects their levy liability, they should account for this change in levy liability in their next Employer Payment Summary (EPS). To make adjustments see https://www.gov.uk/payroll-errors/correcting-your-fps-or-eps.