PAYE54295 | Employer returns: regulation 80 determinations: national insurance contributions - section 8 decisions
From HM Revenue & Customs · PAYE Manual
National Insurance contributions may also be due on earnings but Regulation 80 only provides for recovery of tax.
Any National Insurance contributions disputes will require a decision under Section 8 of the Social Security Contributions (Transfer of Functions) Act 1999.
You should deal with any related NICs liability at the time the determination is considered and can include any liability by following the instructions at PAYE54095