SACM5015 | Provisional Claims and Provisional Figures in Claims: Penalties
From HM Revenue & Customs · Self Assessment Claims Manual
If the customer fails to submit the return or the claim by the statutory filing date or by the date specified in the letter that accompanied the return/claim sent back as being unsatisfactory, a penalty may be imposed under FA09/Sch55.
Should we establish that there was no good reason for the inclusion of provisional figures or that the estimate use was not calculated on a reasonable basis, a penalty may be imposed under FA07/Sch24.
Any unreasonable delay in providing the final figures, after they have been established, may lead to the imposition of a penalty under FA07/Sch24.