См. также: tax year, tax reform, taxes and levies, tax saving
The second part, enacted on August 5, 2000, defines specific taxes, rates, payment schedules, and detailed procedures for tax calculations. It was significantly amended in 2001–2003 with additions like the new corporate profits tax section and the new simplified tax system for small business. (Wikipedia)
How you should go about checking a tax calculation from HM Revenue & Customs (BBC News)
