PAYE79025 | PAYE operation: targeted review forms: examining review forms
From HM Revenue & Customs · PAYE Manual
The purpose of examining the review forms is to
Check the individual’s liability for the year of the form
Deal correctly with any underpayment or overpayment
Keep the CY and CY+1 coding up to date
Note: You must give priority to examining forms R40 since these are repayment claims and set the R40 check box for issue in the following year if annual repayment is likely.