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HMRC internal manual

COTAX Manual

HM Revenue & Customs
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CT Pay and File: accounting periods: maintaining the AP record

For full information on maintaining the AP record, refer to COM1080.

When you create new CT Pay and File APs that overlap existing CT Pay and File APs you need to specify one only ‘related’ AP for every new AP you create.

This is important if you have issued an assessment for the existing AP. Specifying the related AP lets COTAX identify to which (superseding) AP the issued assessment will now relate. Therefore, before you use Function MAPD (Maintain AP Dates) to change an AP, use Function DASS (Display Assessment Details) to check if any assessments exist on the AP(s) to be superseded. Even where no assessments exist you must still relate the APs.

The entries made affect the transfer of payments, postings and signals between superseding and superseded APs.

It is normally the case that you relate a new (superseding) AP with the old (superseded) AP which it mainly overlaps. If, exceptionally, that is not appropriate you can relate the new AP differently.

See COM150060 for guidance on amending APs for which assessments have been issued.

For a list of forms relevant to this subject, see COM150030.

For a list of functions to use in particular situations, see COM150010.

For legislation applying to this subject, see COM150020.