CBTM02030 | Claims, awards and rates: Amending claims
From HM Revenue & Customs · Child Benefit Technical Manual
Child Benefit & Guardian’s Allowance (Administration) Regulations 2003,regulation 8
Anyone who has made a claim may amend it by notifying the appropriate office (see CBTM02010) in writing, as long as the appropriate office isnotified before a decision has been made on the claim.
Her Majesty’s Revenue & Customs may treat a claim amended in this way as if ithad been so amended when it was first made.