IHTM36022 | Late accounts: accounts subject to a penalty
From HM Revenue & Customs · Inheritance Tax Manual
The late delivery (IHTM36033) of the following accounts may result in a penalty under IHTA84/S245
The penalty provisions need to be considered for all late accounts, including those delivered by persons domiciled outside the United Kingdom (IHTM13000) or not a long-term UK resident (IHTM47000).
The legislation also applies to the late delivery of a corrective account (IHTM10011) (form C4). But you should not normally seek a penalty for the late delivery of the corrective account or Inventory under IHTA84/S245. You should instead consider a penalty for failing to correct an error in an account (IHTM36106), IHTA84/S248 (1), if you discover that a corrective account or inventory was not submitted promptly after the discovery of a defect in the original account.