During the tax year (6 April one year to 5 April the next) there are key dates by which you need to send HM Revenue & Customs (HMRC) your tax return and/or make certain payments. It's important to be aware of these dates as HMRC can impose penalties and surcharges if you miss them.
With effect from 1st February 2009 the fines levied by Companies House for late filing of accounts by private limited companies have been increased to the following:
Not more than 1 month late - £150
Between 1 and 3 months late - £375
Between 3 and 6 months late - £750
For Futher Detail Please log on useful linkswww.hmrc.gov.uk