Guidance notes for the tax credits claim form and renewals forms are available on the HM Revenue and Customs website at
together with checklists for the award notice.
Award notices are tailored to individual circumstances and individually printed as required rather than existing in a standard format.
HMRC do not have a definitive up to date list of standard letters but estimate that there are currently around 200 letters which are replaced or updated at intervals as HMRC learn more about what information they need to provide to their tax credits customers. It would not be practicable to keep up to date copies of all these items in the House Library.