A disclosure is a voluntary disclosure if, at the time the disclosure is made, the person making the disclosure
Otherwise it is a prompted disclosure.
HMRC want to encourage voluntary disclosures.
If the claimant voluntarily corrects their details and the
change only affects the Current Year (CY), unless there is already
an examination for that year, the change can be processed by the
Tax Credit Office (TCO) or Helpline and penalties are not
considered.
However once a Tax Credit claim has been finalised it can
only be changed under the strict rules provided for by the law. Two
of those rules are prescribed at Sections 19 and Sections 20 (S19
and S20) of the Tax Credit Act (TCA).
When the TCO or Helpline identify a change of circumstance
that will affect a finalised year, which can only be corrected
using S19 or S20, the case is referred to a special team. The
special teams are based within Claimant Compliance and are known as
the S19Lite/S20Lite teams.
Processes known as S19Lite and S20Lite process have been
specifically designed, for use by those teams, to deal with
voluntary disclosures made after the claim has been finalised, see
CCOM28105 onwards.
The S19Lite and S20Lite processes must only be followed by
the S19Lite or S20Lite teams, see
CCM2220.