CTM61790 | Close Companies: loans to participators and arrangements conferring benefit on participator: assessments
From HM Revenue & Customs · Company Taxation Manual
applies all the rules in the Corporation Tax Acts to including the insertions. This includes, but is not limited to, the rules on assessing, collecting, rights of appeal, administration, penalties and interest with any necessary modifications.
For assessments for accounting periods ended after 30 September 1993 but on or before 30 June 1999, see onwards (CTPF procedures).
If you need to make extended time limit assessments for periods ended up to 30 June 1999 see . You should keep under review all open cases to which or S464A may apply to ensure that any protective assessments that may be needed are made within the time limits.
For accounting periods ended on or after 1 July 1999, see onwards (CTSA rules).
There is guidance on the late payment interest rules at (CTPF) and (CTSA) and repayment interest rules at (CTPF) and (CTSA).