The Adjudicator's Office - Explains the mechanism for complaining about the Inland Revenue and Valuation Office and HM Customs and Excise.
HM Revenue and Customs - Includes information about the UK's customs and tax department and includes the prototype on-line VAT (Value Added Tax) returns system.
Valuation Office Agency - Site explaining the role of the VOA in connection with council tax bands, rating assessments of non-domestic property, Capital Gains and Inheritance Tax valuations and "right to buy" determinations in the UK.
Valuation Tribunal Service - Independent body responsible for hearing appeals concerning tax valuations. Site provides details of VTS procedures and contacts.