SolvedCH81070 | Penalties for inaccuracies: in what circumstances is a penalty payable: conditions for penalty for inaccuracy
From HM Revenue & Customs · Compliance Handbook
You must check the date from which these rules apply for the tax or duty you are dealing with. See CH81011 for full details.
Not every inaccuracy will incur a penalty. A penalty is not due if a person takes reasonable care, see CH81120, to complete a document correctly, even if it later turns out to be wrong. See CH81080 where a person discovers this sort of inaccuracy after they have sent us the document.
A person (P), see CH81040, may be charged a penalty where
they give us, see CH81050, an inaccurate document, and
the inaccurate document either amounts or leads to
an understatement of a liability to tax, or
a false or inflated statement of a loss, or
a false or inflated claim to repayment of tax, see CH81071, and
the inaccuracy was
See CH81165 where the inaccuracy in P’s document arose because another person deliberately supplied false information to or deliberately withheld information from P.
FA07/SCH24/PARA1 (1), (2), (3)